MTM_ColHdrSepLBtnDown

This message is posted when the user presses the left mouse button while the cursor is over a column header separator.
A column header separator is the area between two column headers where the sizing cursor appears.

Parameters
wParam
Handle of the column
lParam
Unused

Return
The return value is ignored

See also
Extended messages

Created with the Personal Edition of HelpNDoc: Write eBooks for the Kindle