MIDITimer - Parameters

ulAction (ULONG) - input

Indicates whether to start or stop the time. A valid value for ulAction is either MIDI_START_TIMER or MIDI_STOP_TIMER.

ulFlag (ULONG) - input

This parameter is not currently used and must be set to 0.

rc (ULONG) - returns

Returns 0 if the command is completed successfully.

MIDIERR_HARDWARE_FAILED

A hardware specific problem was encountered.
MIDIERR_INTERNAL_SYSTEM
System problem.
MIDIERR_INVALID_FLAG
The ulFlag value is not set to 0.
MIDIERR_INVALID_PARAMETER
The ulAction parameter contains an invalid value.

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