enumChartAxisSorting

typedef enum
{
	chartaxissorting_none       = 0, // 
	chartaxissorting_ascending  = 1, // 1-2-3-...
	chartaxissorting_descending = 2, // 3-2-1-...
	chartaxissorting_gaussian   = 3  // bell curve
} enumChartAxisSorting;

used in IXlsChartAxis::Sorting property.