GM_SelectFile

GM_Error_t32 GM_SelectFile
    ( 
    char*       aFilename,  // buffer in which to place selected filename (must be at least _MAX_PATH characters in length)
    const char* aFilterStr, // filter string for open dialog (NULL for default)
    const char* aInitialDir,// initial directory to start in (NULL for current)
    HWND        aParentWnd  // handle to parent window for file selection dialog
    );