case WM_CREATE
  int RequestWid = 640, RequestHei = 480;

  RECT tCli, tWnd;
  GetClientRect( hwnd , &tCli );
  GetWindowRect( hwnd , &tWnd );

  SetWindowPos( hwnd , NULL , 0 , 0 ,
  RequestWid+((tWnd.right -tWnd.left)-(tCli.right )),
  RequestHei+((tWnd.bottom-tWnd.top )-(tCli.bottom)),
  SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE );

  break;