處理MM_WOM_DONE訊息

下列範例示範如何處理 MM_WOM_DONE 訊息。 此範例假設應用程式不會播放多個資料區塊，因此可以在播放單一資料區塊之後關閉輸出裝置。

// 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); 
}