设置播放窗口

以下示例查找播放 AVI 文件所需的维度，创建对应于该大小的窗口，并使用 MCIAVI 驱动程序在窗口中播放文件。 它使用 mciSendCommand 函数

HWND hwnd; 
MCI_DGV_RECT_PARMS mciRect; 
 
// Get the movie dimensions with MCI_WHERE. 
 
mciSendCommand(wDeviceID, MCI_WHERE, MCI_DGV_WHERE_SOURCE, 
    (DWORD)(LPSTR)&mciRect); 
 
// Create the playback window. Make it bigger for the border. 
// Note that the right and bottom members of RECT structures in MCI 
// are unusual; rc.right is set to the rectangle's width, and 
// rc.bottom is set to the rectangle's height.

hwndMovie = CreateWindow("mywindow", "Playback", 
    WS_CHILD|WS_BORDER, 0,0, 
    mciRect.rc.right+(2*GetSystemMetric(SM_CXBORDER)),
    mciRect.rc.bottom+(2*GetSystemMetric(SM_CYBORDER)), 
    hwndParent, hInstApp, NULL); 
 
if (hwndMovie){ 
    // Window created OK; make it the playback window. 
 
    MCI_DGV_WINDOW_PARMS mciWindow; 
 
    mciWindow.hWnd = hwndMovie; 
    mciSendCommand(wDeviceID, MCI_WINDOW, MCI_DGV_WINDOW_HWND, 
        (DWORD)(LPSTR)&mciWindow); 
 
}