MIDM_PROPERTIES

Sent to a MIDI input device driver to change properties of the input stream.

Returns zero if the operation is successful. Otherwise, it returns an error number. Possible error values include the following:

MMSYSERR_NOTENABLED	The driver failed to load or initialize.
MMSYSERR_INVALPARAM	The property or property value was invalid.

dwParam1

Contains a far pointer to a structure containing information about the stream.

dwParam2

Contains flags specifying the operation and property.

MIDIPROP_SET	Tells the driver to set the given property.
MIDIPROP_GET	Tells the driver to read the given property.

For a description of the stream properties, see the documentation for the midiStreamProperties function, and the MIDIPROPTIMEDIV, MIDIPROPTEMPO, and MIDIPROPCBTIMEOUT structures in the MIDI SDK documentation