This structure contains information used on an MMIOM_WINMSG message.
Note: The fields of this structure correspond to the parameters of the WinSendMsg and WinPostMsg functions.
The digital video device sends WM_DESTROYCLIPBOARD messages to the I/O procedure. Since it ignores the return code from the message, movie file I/O procedures are not required to support MMIOM_WINMSG.
typedef struct _MMIO_WINMSG { HWND hwndWindow; /* Window handle. */ USHORT usMessage; /* PM message number. */ PVOID pParam1; /* First PM message parameter. */ PVOID pParam2; /* Second PM message parameter. */ } MMIO_WINMSG; typedef MMIO _ WINMSG * PMMIO _ WINMSG ;