/***************************************************************************\
* xxxSnapWindow
*
* Effects: Snaps either the desktop hwnd or the active front most window. If
* any other window is specified, we will snap it but it will be clipped.
*
\***************************************************************************/

BOOL xxxSnapWindow(
    PWND pwnd)
{
   
    /*
     * Open the clipboard and empty it.
     *
     * pwndDesktop is made the owner of the clipboard, instead of the
     * currently active window; -- SANKAR -- 20th July, 1989 --
     */
   
    fSuccess = xxxOpenClipboard(pwndT, NULL);
 
    xxxEmptyClipboard(pwinsta);

 。。。。。。。。
。。。。。
    hdcScr = _GetWindowDC(pwnd);
    if (!hdcScr)
        goto MemoryError;

  
    hdcMem = GreCreateCompatibleDC(hdcScr);
  
    if (SYSMET(SAMEDISPLAYFORMAT)) {
        hbm = GreCreateCompatibleBitmap(hdcScr, rc.right, rc.bottom);
    } else {
        hbm = GreCreateBitmap(rc.right, rc.bottom, 1, gpDispInfo->BitCountMax, NULL);
    }

    if (!hbm) {
        hbm = GreCreateBitmap(rc.right, rc.bottom, 1, 1, NULL);
        if (!hbm)
            goto MemoryError;
    }

    hbmOld = GreSelectBitmap(hdcMem, hbm);

 
    fRet = GreBitBlt(hdcMem, 0, 0, rc.right, rc.bottom, hdcScr, rc.left, rc.top, SRCCOPY | CAPTUREBLT, 0);

    GreSelectBitmap(hdcMem, hbmOld);

    _SetClipboardData(CF_BITMAP, hbm, FALSE, TRUE);

   
    PlayEventSound(USER_SOUND_SNAPSHOT);

    fRet = TRUE;

SnapExit:
。。。。。。。。
    /*
     * Release the window/client DC.
     */
     if (hdcScr) {
         _ReleaseDC(hdcScr);
     }

    xxxCloseClipboard(pwinsta);
  
。。。。。。    
goto SnapExit;
}