CMFCHeaderCtrl::GetSortColumn
Retrieves the zero-based index of the first sorted column in the header control.
int GetSortColumn() const;
Return Value
The index of a sorted column, or -1 if no sorted column is found.
Remarks
If the header control is in multiple column sort mode and you compiled the application in debug mode, this method asserts and advises you to use the CMFCHeaderCtrl::GetColumnState method instead. If the header control is in multiple column sort mode and you compiled the application in retail mode, this method returns -1.
Requirements
Header: afxheaderctrl.h