よろしくお願いします。
memset(&ofn,0,sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = hWnd;
ofn.lpstrFilter = TEXT("Jpeg image [*.JPG, *.JPEG]\0*.jpg;*.jpeg\0\0");
ofn.nFilterIndex = 1;
ofn.lpstrFile = fn;
ofn.nMaxFile = MAX_PATH;
ofn.Flags = OFN_HIDEREADONLY;
if(GetSaveFileName(&ofn)) {
id = CopyFile("tmp.jpg", fn, TRUE);
}