Automating Playback for MCIWnd

You can automate playback for MCIWnd by specifying certain window styles in the MCIWndCreate_T_JCT function. To play the device, the window needs a parent window to process notification messages, a playback area to play AVI files, and notification of device mode changes to identify when playback stops. The window does not need a toolbar. You can set these characteristics by specifying the appropriate styles in MCIWndCreate.

The following example uses menu commands to create an MCIWnd window to play content from several different types of devices. The MCIWndCreate function creates the MCIWnd window, and devices and files are loaded by using the MCIWndOpenF.J2CX macro in the device-specific commands. When a device finishes playing, you close the device by trapping the MCIWNDM_NOTIFYMODE199B3OV message and issuing the MCIWndCloseGB21LI macro.

case WM_COMMAND:

    switch (wParam)

    { 

        case IDM_CREATEMCIWND:

            dwMCIWndStyle = WS_CHILD |     // child window

                WS_VISIBLE |               // visible

                MCIWNDF_NOTIFYMODE |       // notifies of mode changes

                MCIWNDF_NOPLAYBAR;          // hides toolbar

            g_hwndMCIWnd = MCIWndCreate(hwnd,

                g_hinst, dwMCIWndStyle, NULL);

            break;

        case IDM_PLAYCDA:

            LoadNGoMCIWnd(hwnd, "CDAudio");

            break;

        case IDM_PLAYWAVE:

            LoadNGoMCIWnd(hwnd, "SoundWave.WAV");

            break;

        case IDM_PLAYMIDI:

            LoadNGoMCIWnd(hwnd, "MIDIFile.MID");

            break;

        case IDM_PLAYAVI:

            LoadNGoMCIWnd(hwnd, "AVIFile.AVI");

            break;

        case IDM_EXIT:

            MCIWndDestroy(g_hwndMCIWnd);

            DestroyWindow(hwnd);

            break;

    }

    break;

case MCIWNDM_NOTIFYMODE:

    if (lParam == MCI_MODE_STOP)  // device stopped

    { 

        MessageBox(hwnd,"","Closing Device",MB_OK);

        MCIWndClose(g_hwndMCIWnd);

    }

    break;

// Handle other messages here.

// LoadNGoMCIWnd - automatically loads and plays a multimedia device

//

// hwnd -  handle to the parent window

// lpstr - pointer to device or filename played by device

//

// Global variable

// extern HINSTANCE g_hwndMCIWnd;  instance handle to MCIWnd window

VOID LoadNGoMCIWnd(HWND hwnd, LPSTR lpstr)

{ 

    MessageBox(hwnd, lpstr, "Loading Device", MB_OK);

    MCIWndOpen(g_hwndMCIWnd, lpstr, NULL);   // new device in window

    MCIWndPlay(g_hwndMCIWnd);                // plays device

}