Checks whether a numerator is present in the key of a measure in the tablature which is currently loaded.
GPMID_ENTRY int GPMID_IsMeasureKeyNumeratorPresent( unsigned int aMeasureIdx );
The zero-based index of the measure for which to retrieve whether a numerator is present.
Zero if a numerator is not present, non-zero otherwise.
This function can be called with an index ranging from 0 to the value returned by GPMID_GetMeasureCount minus 1.