MIDITimer Return Value - rc

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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