You can add user-controlled playback to an existing application by calling the MCIWndCreate function as follows:
MCIWndCreate(hwndParent, hInstModule, NULL, "filename.typ");
The MCIWndCreate parameters identify handles to the parent window and to the module instance associated with the MCIWnd window. They also specify window styles and the filename (or device name) to associate with the MCIWnd window.
MCIWndCreate automatically performs the following steps that, for other window classes, you would implement in your code yourself: