An application sends a ZGM_GETSORTCOLUMN to get the column that was double-clicked indicating that the user wants to sort the ZeeGrid.
ZGM_GETSORTCOLUMN wParam = 0; //not used; must be zero lParam = 0; //not used; must be zero
The column number that is being double-clicked to sort.
This message is normally sent in response to a ZGN_SORT notification message from the ZeeGrid. Its purpose is to determine the column that is about to be sorted, so that the secondary sort column can be set programmatically. The application will recieve a ZGN_SORT notification if ZGM_SORTONCOLDCLICK is set to TRUE.