C++: Implement conditional signal handlers based on overrides. This uses templates in a sort of hacky way to determine if our virtual functions have been overridden. Leaving some debug code in for the moment to make sure it works on all platforms. OS/2 will require using GCC for the C++ bindings, since VisualAge only supports C++99 and Watcom doesn't even support that as far as I know.

#include "winuser.h"
#ifdef DW64
2 RT_MANIFEST dw.dll.x64.manifest
#else
2 RT_MANIFEST dw.dll.x86.manifest
#endif