HDM_GETITEMCOUNT message
Gets a count of the items in a header control. You can send this message explicitly or use the Header_GetItemCount macro.
Parameters
-
wParam
- Must be zero.
-
lParam
- Must be zero.
Return value
Returns the number of items if successful, or -1 otherwise.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| Header |
|