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annotate win/XBrowseForFolder.cpp @ 1362:412af8059331

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Attempt to get it building with Mingw again... builds but crashes. Fix building DLL without HTML widget support... Mingw is missing required headers. Moved wrapper functions into the main source file so it will export the APIs even if unsupported. Removed debugging code from XBrowseForFolder.cpp because Mingw does not support it.
author bsmith@81767d24-ef19-dc11-ae90-00e081727c95
date Fri, 18 Nov 2011 18:56:40 +0000
parents bf3a6d596cd4
children f8d1da63fb77
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1 // XBrowseForFolder.cpp Version 1.2
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2 //
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3 // Author: Hans Dietrich
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4 // hdietrich@gmail.com
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5 //
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6 // Description:
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7 // XBrowseForFolder.cpp implements XBrowseForFolder(), a function that
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8 // wraps SHBrowseForFolder().
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9 //
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10 // History
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11 // Version 1.2 - 2008 February 29
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12 // - Changed API to allow for initial CSIDL.
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13 // - Added option to set dialog caption, suggested by SimpleDivX.
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14 // - Added option to set root, suggested by Jean-Michel Reghem.
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15 //
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16 // Version 1.1 - 2003 September 29 (not released)
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17 // - Added support for edit box
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18 //
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19 // Version 1.0 - 2003 September 25
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20 // - Initial public release
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21 //
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22 // License:
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23 // This software is released into the public domain. You are free to use
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24 // it in any way you like, except that you may not sell this source code.
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25 //
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26 // This software is provided "as is" with no expressed or implied warranty.
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27 // I accept no liability for any damage or loss of business that this
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28 // software may cause.
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29 //
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30 ///////////////////////////////////////////////////////////////////////////////
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31
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32 /* Make sure we get the right version */
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33 #define _WIN32_IE 0x0500
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34
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35 #ifndef __AFX_H__
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36 #include "windows.h"
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37 #include "tchar.h"
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38 #endif
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39
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40 #include "Shlobj.h"
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41 #include "io.h"
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42 #include "XBrowseForFolder.h"
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43
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44 #ifndef __MINGW32__
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45 #pragma warning(disable: 4127) // conditional expression is constant (_ASSERTE)
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46 #pragma warning(disable : 4996) // disable bogus deprecation warning
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47 #endif
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48
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49 /* MingW does not have this */
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50 #if !defined(BIF_NONEWFOLDERBUTTON)
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51 # define BIF_NONEWFOLDERBUTTON 0x200
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52 #endif
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53
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54 //=============================================================================
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55 // struct to pass to callback function
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56 //=============================================================================
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57 struct FOLDER_PROPS
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58 {
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59 LPCTSTR lpszTitle;
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60 LPCTSTR lpszInitialFolder;
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61 UINT ulFlags;
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62 };
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63
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64 #ifndef __AFX_H__
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65
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66 ///////////////////////////////////////////////////////////////////////////////
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67 // CRect - a minimal CRect class
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68
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69 class CRect : public tagRECT
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70 {
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71 public:
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72 //CRect() { }
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73 CRect(int l = 0, int t = 0, int r = 0, int b = 0)
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74 {
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75 left = l;
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76 top = t;
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77 right = r;
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78 bottom = b;
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79 }
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80 int Width() const { return right - left; }
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81 int Height() const { return bottom - top; }
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82 void SwapLeftRight() { SwapLeftRight(LPRECT(this)); }
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83 static void SwapLeftRight(LPRECT lpRect) { LONG temp = lpRect->left;
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84 lpRect->left = lpRect->right;
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85 lpRect->right = temp; }
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86 operator LPRECT() { return this; }
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87 };
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88 #endif
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89
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90 ///////////////////////////////////////////////////////////////////////////////
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91 // ScreenToClientX - helper function in case non-MFC
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92 static void ScreenToClientX(HWND hWnd, LPRECT lpRect)
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93 {
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94 ::ScreenToClient(hWnd, (LPPOINT)lpRect);
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95 ::ScreenToClient(hWnd, ((LPPOINT)lpRect)+1);
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96 }
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97
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98 ///////////////////////////////////////////////////////////////////////////////
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99 // MoveWindowX - helper function in case non-MFC
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100 static void MoveWindowX(HWND hWnd, CRect& rect, BOOL bRepaint)
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101 {
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102 ::MoveWindow(hWnd, rect.left, rect.top,
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103 rect.Width(), rect.Height(), bRepaint);
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104 }
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105
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106 ///////////////////////////////////////////////////////////////////////////////
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107 // SizeBrowseDialog - resize dialog, move controls
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108 static void SizeBrowseDialog(HWND hWnd, FOLDER_PROPS *fp)
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109 {
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110 // find the folder tree and make dialog larger
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111 HWND hwndTree = FindWindowEx(hWnd, NULL, _T("SysTreeView32"), NULL);
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112
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113 if (!hwndTree)
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114 {
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115 // ... this usually means that BIF_NEWDIALOGSTYLE is enabled.
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116 // Then the class name is as used in the code below.
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117 hwndTree = FindWindowEx(hWnd, NULL, _T("SHBrowseForFolder ShellNameSpace Control"), NULL);
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118 }
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119
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120 CRect rectDlg;
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121
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122 if (hwndTree)
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123 {
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124 // check if edit box
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125 int nEditHeight = 0;
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126 HWND hwndEdit = FindWindowEx(hWnd, NULL, _T("Edit"), NULL);
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127 CRect rectEdit;
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128 if (hwndEdit && (fp->ulFlags & BIF_EDITBOX))
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129 {
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130 ::GetWindowRect(hwndEdit, &rectEdit);
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131 ScreenToClientX(hWnd, &rectEdit);
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132 nEditHeight = rectEdit.Height();
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133 }
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134 else if (hwndEdit)
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135 {
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136 ::MoveWindow(hwndEdit, 20000, 20000, 10, 10, FALSE);
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137 ::ShowWindow(hwndEdit, SW_HIDE);
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138 hwndEdit = 0;
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139 }
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140
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141 // make the dialog larger
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142 ::GetWindowRect(hWnd, &rectDlg);
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143 rectDlg.right += 40;
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144 rectDlg.bottom += 30;
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145 if (hwndEdit)
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146 rectDlg.bottom += nEditHeight + 5;
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147 MoveWindowX(hWnd, rectDlg, TRUE);
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148 ::GetClientRect(hWnd, &rectDlg);
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149
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150 int hMargin = 10;
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151 int vMargin = 10;
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152
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153 // check if new dialog style - this means that there will be a resizing
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154 // grabber in lower right corner
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155 if (fp->ulFlags & BIF_NEWDIALOGSTYLE)
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156 hMargin = ::GetSystemMetrics(SM_CXVSCROLL);
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157
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158 // move the Cancel button
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159 CRect rectCancel;
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160 HWND hwndCancel = ::GetDlgItem(hWnd, IDCANCEL);
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161 if (hwndCancel)
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162 ::GetWindowRect(hwndCancel, &rectCancel);
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163 ScreenToClientX(hWnd, &rectCancel);
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164 int h = rectCancel.Height();
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165 int w = rectCancel.Width();
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166 rectCancel.bottom = rectDlg.bottom - vMargin;//nMargin;
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167 rectCancel.top = rectCancel.bottom - h;
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168 rectCancel.right = rectDlg.right - hMargin; //(scrollWidth + 2*borderWidth);
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169 rectCancel.left = rectCancel.right - w;
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170 if (hwndCancel)
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171 {
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172 MoveWindowX(hwndCancel, rectCancel, FALSE);
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173 }
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174
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175 // move the OK button
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176 CRect rectOK(0, 0, 0, 0);
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177 HWND hwndOK = ::GetDlgItem(hWnd, IDOK);
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178 if (hwndOK)
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179 ::GetWindowRect(hwndOK, &rectOK);
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180 ScreenToClientX(hWnd, &rectOK);
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181 rectOK.bottom = rectCancel.bottom;
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182 rectOK.top = rectCancel.top;
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183 rectOK.right = rectCancel.left - 10;
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184 rectOK.left = rectOK.right - w;
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185 if (hwndOK)
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186 {
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187 MoveWindowX(hwndOK, rectOK, FALSE);
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188 }
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189
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190 // expand the folder tree to fill the dialog
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191 CRect rectTree;
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192 ::GetWindowRect(hwndTree, &rectTree);
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193 ScreenToClientX(hWnd, &rectTree);
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194 if (hwndEdit)
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195 {
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196 rectEdit.left = hMargin;
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197 rectEdit.right = rectDlg.right - hMargin;
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198 rectEdit.top = vMargin;
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199 rectEdit.bottom = rectEdit.top + nEditHeight;
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200 MoveWindowX(hwndEdit, rectEdit, FALSE);
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201 rectTree.top = rectEdit.bottom + 5;
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202 }
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203 else
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204 {
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205 rectTree.top = vMargin;
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206 }
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207 rectTree.left = hMargin;
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208 rectTree.bottom = rectOK.top - 10;//nMargin;
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209 rectTree.right = rectDlg.right - hMargin;
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210 MoveWindowX(hwndTree, rectTree, FALSE);
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211 }
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212 }
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213
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214 ///////////////////////////////////////////////////////////////////////////////
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215 // BrowseCallbackProc - SHBrowseForFolder callback function
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216 static int CALLBACK BrowseCallbackProc(HWND hWnd, // Window handle to the browse dialog box
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217 UINT uMsg, // Value identifying the event
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218 LPARAM lParam, // Value dependent upon the message
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219 LPARAM lpData) // Application-defined value that was
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220 // specified in the lParam member of the
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221 // BROWSEINFO structure
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222 {
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223 switch (uMsg)
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224 {
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225 case BFFM_INITIALIZED: // sent when the browse dialog box has finished initializing.
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226 {
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227 // remove context help button from dialog caption
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228 LONG lStyle = ::GetWindowLong(hWnd, GWL_STYLE);
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229 lStyle &= ~DS_CONTEXTHELP;
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230 ::SetWindowLong(hWnd, GWL_STYLE, lStyle);
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231 lStyle = ::GetWindowLong(hWnd, GWL_EXSTYLE);
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232 lStyle &= ~WS_EX_CONTEXTHELP;
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233 ::SetWindowLong(hWnd, GWL_EXSTYLE, lStyle);
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234
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235 FOLDER_PROPS *fp = (FOLDER_PROPS *) lpData;
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236 if (fp)
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237 {
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238 if (fp->lpszInitialFolder && (fp->lpszInitialFolder[0] != _T('\0')))
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239 {
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240 // set initial directory
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241 ::SendMessage(hWnd, BFFM_SETSELECTION, TRUE, (LPARAM)fp->lpszInitialFolder);
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242 }
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243
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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244 if (fp->lpszTitle && (fp->lpszTitle[0] != _T('\0')))
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245 {
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246 // set window caption
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247 ::SetWindowText(hWnd, fp->lpszTitle);
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248 }
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249 }
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250
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251 SizeBrowseDialog(hWnd, fp);
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252 }
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253 break;
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254
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255 case BFFM_SELCHANGED: // sent when the selection has changed
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256 {
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257 TCHAR szDir[MAX_PATH*2] = { 0 };
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258
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259 // fail if non-filesystem
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260 BOOL bRet = SHGetPathFromIDList((LPITEMIDLIST) lParam, szDir);
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261 if (bRet)
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262 {
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263 // fail if folder not accessible
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264 if (_taccess(szDir, 00) != 0)
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265 {
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266 bRet = FALSE;
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267 }
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268 else
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269 {
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270 SHFILEINFO sfi;
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271 ::SHGetFileInfo((LPCTSTR)lParam, 0, &sfi, sizeof(sfi),
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272 SHGFI_PIDL | SHGFI_ATTRIBUTES);
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273
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274 // fail if pidl is a link
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275 if (sfi.dwAttributes & SFGAO_LINK)
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276 {
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277 bRet = FALSE;
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278 }
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279 }
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280 }
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281
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282 // if invalid selection, disable the OK button
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283 if (!bRet)
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284 {
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285 ::EnableWindow(GetDlgItem(hWnd, IDOK), FALSE);
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286 }
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287 }
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288 break;
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289 }
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290
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291 return 0;
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292 }
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293
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294 ///////////////////////////////////////////////////////////////////////////////
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295 //
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296 // XBrowseForFolder()
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297 //
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298 // Purpose: Invoke the SHBrowseForFolder API. If lpszInitialFolder is
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299 // supplied, it will be the folder initially selected in the tree
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300 // folder list. Otherwise, the initial folder will be set to the
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301 // current directory. The selected folder will be returned in
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302 // lpszBuf.
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303 //
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304 // Parameters: hWnd - handle to the owner window for the dialog
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305 // lpszInitialFolder - initial folder in tree; if NULL, the initial
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306 // folder will be the current directory; if
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307 // if this is a CSIDL, must be a real folder.
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308 // nRootFolder - optional CSIDL of root folder for tree;
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309 // -1 = use default.
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310 // lpszCaption - optional caption for folder dialog
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311 // lpszBuf - buffer for the returned folder path
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312 // dwBufSize - size of lpszBuf in TCHARs
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313 // bEditBox - TRUE = include edit box in dialog
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314 //
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315 // Returns: BOOL - TRUE = success; FALSE = user hit Cancel
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316 //
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317 BOOL _cdecl XBrowseForFolder(HWND hWnd,
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318 LPCTSTR lpszInitialFolder,
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319 int nRootFolder,
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320 LPCTSTR lpszCaption,
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321 LPTSTR lpszBuf,
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322 DWORD dwBufSize,
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323 BOOL bEditBox /*= FALSE*/)
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324 {
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325 if (lpszBuf == NULL || dwBufSize < MAX_PATH)
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326 return FALSE;
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327
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328 ZeroMemory(lpszBuf, dwBufSize*sizeof(TCHAR));
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329
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330 BROWSEINFO bi = { 0 };
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331
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332 // check if there is a special root folder
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333 LPITEMIDLIST pidlRoot = NULL;
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334 if (nRootFolder != -1)
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335 {
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336 if (SUCCEEDED(SHGetSpecialFolderLocation(hWnd, nRootFolder, &pidlRoot)))
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337 bi.pidlRoot = pidlRoot;
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338 }
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339
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340 TCHAR szInitialPath[MAX_PATH*2] = { _T('\0') };
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341 if (lpszInitialFolder)
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342 {
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343 // is this a folder path string or a csidl?
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344 if (HIWORD(lpszInitialFolder) == 0)
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345 {
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346 // csidl
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347 int nFolder = LOWORD((UINT)(UINT_PTR)lpszInitialFolder);
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348 SHGetSpecialFolderPath(hWnd, szInitialPath, nFolder, FALSE);
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349 }
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350 else
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351 {
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352 // string
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353 _tcsncpy(szInitialPath, lpszInitialFolder,
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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354 sizeof(szInitialPath)/sizeof(TCHAR)-2);
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355 }
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356 }
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357
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358 if ((szInitialPath[0] == _T('\0')) && (bi.pidlRoot == NULL))
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359 {
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360 // no initial folder and no root, set to current directory
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361 ::GetCurrentDirectory(sizeof(szInitialPath)/sizeof(TCHAR)-2,
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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362 szInitialPath);
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363 }
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diff changeset
364
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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diff changeset
365 FOLDER_PROPS fp;
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diff changeset
366
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367 bi.hwndOwner = hWnd;
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368 bi.ulFlags = BIF_RETURNONLYFSDIRS; // do NOT use BIF_NEWDIALOGSTYLE,
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369 // or BIF_STATUSTEXT
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diff changeset
370 if (bEditBox)
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371 bi.ulFlags |= BIF_EDITBOX;
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372 bi.ulFlags |= BIF_NONEWFOLDERBUTTON;
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373 bi.lpfn = BrowseCallbackProc;
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374 bi.lParam = (LPARAM) &fp;
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diff changeset
375
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376 fp.lpszInitialFolder = szInitialPath;
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377 fp.lpszTitle = lpszCaption;
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378 fp.ulFlags = bi.ulFlags;
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diff changeset
379
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diff changeset
380 BOOL bRet = FALSE;
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diff changeset
381
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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diff changeset
382 LPITEMIDLIST pidlFolder = SHBrowseForFolder(&bi);
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diff changeset
383
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384 if (pidlFolder)
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385 {
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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386 TCHAR szBuffer[MAX_PATH*2] = { _T('\0') };
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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387
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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388 if (SHGetPathFromIDList(pidlFolder, szBuffer))
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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389 {
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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390 _tcsncpy(lpszBuf, szBuffer, dwBufSize-1);
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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391 bRet = TRUE;
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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392 }
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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393 }
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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394
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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395 // free up pidls
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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396 IMalloc *pMalloc = NULL;
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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397 if (SUCCEEDED(SHGetMalloc(&pMalloc)) && pMalloc)
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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398 {
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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399 if (pidlFolder)
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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400 pMalloc->Free(pidlFolder);
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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401 if (pidlRoot)
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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402 pMalloc->Free(pidlRoot);
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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403 pMalloc->Release();
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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404 }
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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405
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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406 return bRet;
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mhessling@81767d24-ef19-dc11-ae90-00e081727c95
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407 }