HDM_HITTEST
The HDM_HITTEST
message tests a point to determine which header item, if any, is at the
specified point.
HDM_HITTEST
wParam = 0;
lParam = (LPARAM) (HD_HITTESTINFO FAR *) phdhti;
Parameters
phdhti
Pointer to an
HD_HITTESTINFO structure that contains the position to test and receives
information about the results of the test.
Return Values
Returns the
index of the item at the specified position, if any, or - 1 otherwise.
See Also
HD_HITTESTINFO