HDM_GETITEMCOUNT  AMDL_2 

The HDM_GETITEMCOUNT message retrieves a count of the items in a header control. You can send this message explicitly or by using the Header_GetItemCountH1QLVU macro.

HDM_GETITEMCOUNT

wParam = 0;

lParam = 0;

Return Values

If the operation succeeds, the return value is the number of items.

If the operation fails, the return value is - 1.

See Also