cropping-an-image.md

title	description	ms.assetid	keywords	ms.topic	ms.date	ms.custom
Cropping an Image	Cropping an Image	6600751c-d4b6-481d-bf69-be2d34244c05	MCIWndGetSource macro MCIWndPutSource macro	article	4/26/2023	UpdateFrequency5

Cropping an Image

[The feature associated with this page, MCIWnd Window Class, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of MCIWnd Window Class, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The following example creates an MCIWnd window and loads an AVI file. The window includes a crop command in the menu, which crops one-quarter of the height or width from each of the four sides of the frame. The example retrieves the current (initial) dimensions of the source rectangle by using the MCIWndGetSource macro. The modified source rectangle is half the original height and width and is centered in the original frame. The call to the MCIWndPutSource macro redefines the coordinates of the source rectangle.

// extern RECT rSource, rDest; 
 
case WM_COMMAND: 
    switch (wParam) 
    { 
        case IDM_CREATEMCIWND: 
            g_hwndMCIWnd = MCIWndCreate( hwnd, 
                g_hinst, 
                WS_CHILD | WS_VISIBLE, 
                "sample.avi" ); 
            break; 
        case IDM_CROPIMAGE:                          // crops image 
            MCIWndGetSource(g_hwndMCIWnd, &rSource); // source rectangle
            rDest.left = rSource.left +              // new boundaries
                ((rSource.right - rSource.left) / 4); 
            rDest.right = rSource.right - 
                ((rSource.right - rSource.left) / 4); 
            rDest.top = rSource.top + 
                ((rSource.bottom - rSource.top) / 4); 
            rDest.bottom = rSource.bottom - 
                ((rSource.bottom - rSource.top) / 4); 
 
            MCIWndPutSource(g_hwndMCIWnd, &rDest);   // new source rectangle 
    } 
    break; 

    // Handle other messages here.