This method sets the voice menu currently associated with the form.
HRESULT put_VoiceMenu( IUnknown *pUnknownVoiceMenu );
NOERROR indicates success. If an error occurs, the appropriate HRESULT value is returned.
Once a voice menu is attached to a form, it is automatically activated or deactivated by the Forms Manager when focus changes for the form or application. This eliminates the need for applications to activate or deactivate their own voice menus when they receive a WM_ACTIVATE message.