open file window (open...)

[NoHero]

ofn.lStructSize       = sizeof(ofn);
ofn.hwndOwner         = 0;
ofn.hInstance         = 0;
ofn.lpstrFilter       = 0;
ofn.lpstrCustomFilter = 0;
ofn.nMaxCustFilter    = 0;
ofn.nFilterIndex      = 0;
ofn.lpstrFile         = szExtBuffer;
ofn.nMaxFile          = MAX_PATH;
ofn.lpstrFileTitle    = 0;
ofn.nMaxFileTitle     = 0;
ofn.lpstrInitialDir   = 0;
ofn.lpstrTitle        = "Open file";
ofn.Flags             = 0;
ofn.nFileOffset       = 0;
ofn.nFileExtension    = 0;
ofn.lpstrDefExt       = 0;
ofn.lCustData         = 0;
ofn.lpfnHook          = 0;
ofn.lpTemplateName    = 0;

This is too much code in my eyes, since it would go easier:

ZeroMemory(&ofn, sizeof(ofn));

ofn.lStructSize       = sizeof(ofn);
ofn.lpstrFile         = szExtBuffer;
ofn.nMaxFile          = MAX_PATH;
ofn.lpstrTitle        = "Open file";

Or even better:

OPENFILENAME ofn = { 0 };

ofn.lStructSize       = sizeof(ofn);
ofn.lpstrFile         = szExtBuffer;
ofn.nMaxFile          = MAX_PATH;
ofn.lpstrTitle        = "Open file";