处理MM_WOM_DONE消息

以下示例演示如何处理 MM_WOM_DONE 消息。 此示例假定应用程序不播放多个数据块，因此它可以在播放单个数据块后关闭输出设备。

// WndProc--Main window procedure. 
LRESULT FAR PASCAL WndProc(HWND hWnd, UINT msg, WPARAM wParam, 
    LPARAM lParam) 
{ 
switch (msg) 
{ 
    case MM_WOM_DONE: 
 
    // A waveform-audio data block has been played and 
    // can now be freed. 
    waveOutUnprepareHeader((HWAVEOUT) wParam, 
        (LPWAVEHDR) lParam, sizeof(WAVEHDR) ); 
    
    // Free hData memory. 
    
    waveOutClose((HWAVEOUT) wParam); 
    break; 
    } 
    return DefWindowProc(hWnd, msg, wParam, lParam); 
}