延展影像和視窗

下列範例會延展視訊剪輯的影像，並變更顯示畫面的外觀比例。 MCIWnd 視窗中顯示的框架高度為兩倍，而原始框架的寬度為三倍。 MCIWndGetDest和MCIWndPutDest宏會擷取並重新定義目的地矩形座標。 GetWindowRect和SetWindowPos函式會管理 MCIWnd 視窗維度的變更。

// extern RECT rCurrent, rDest; 
 
case WM_COMMAND: 
   switch (wParam) 
   { 
       case IDM_CREATEMCIWND: 
           g_hwndMCIWnd = MCIWndCreate(hwnd, 
           g_hinst, 
           WS_CHILD | WS_VISIBLE, 
          "sample.avi"); 
           break;    
 
       case IDM_RESIZEWINDOW: // destination RECT and playback area
           GetWindowRect(g_hwndMCIWnd, &rWin);     // window size 
           MCIWndGetDest(g_hwndMCIWnd, &rCurrent); // destination RECT
           rDest.top = rCurrent.top;               // new boundaries 
           rDest.right = rCurrent.right; 
           rDest.left = rCurrent.left + 
               ((rCurrent.left - rCurrent.right) * 3); 
           rDest.bottom = rCurrent.top + 
               ((rCurrent.bottom - rCurrent.top) * 2); 
           MCIWndPutDest(g_hwndMCIWnd, &rDest); // new RECT
           SetWindowPos(g_hwndMCIWnd,           // window to resize 
               NULL,                          // z-order: don't care 
               0, 0,                          // position: don't care
               rDest.right - rDest.left,      // width 
               (rWin.bottom - rWin.top +           // height (window - 
               (rCurrent.bottom - rCurrent.top) +  //  original RECT +
               (rDest.bottom - rDest.top)),        //  new RECT
               SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE); 
           break; 
   } 
   break; 
 
   // Handle other messages here.