WIDM_CLOSE

See also WIDM_OPEN

Sent to a waveform input device driver to deallocate a specified device.

The return value is an error code, or zero (MMSYSERR_NOERROR) if the operation is successful. Possible error codes are:

MMSYSERR_NOTENABLED	The driver failed to load or initialize.
WAVERR_STILLPLAYING	There are still buffers in the queue.

DWORD dwParam1

Unused.

DWORD dwParam2

Unused.

If there are input buffers that haven't been returned to the application, the driver should fail the close operation by returning a WAVERR_STILLPLAYING error. If the close operation is successful, the driver should use the DriverCallback function to send the client a WIM_CLOSE message.