Gets the bounding rectangle of the split button for a header item with style HDF_SPLITBUTTON. Send this message explicitly or by using the Header_GetItemDropDownRect macro.
A window receives this message through its WindowProc function.
- wParam [in]
The zero-based index of the header control item for which to retrieve the bounding rectangle.
- lParam [in, out]
A pointer to a RECT structure to receive the bounding rectangle information. The message sender is responsible for allocating this structure. The coordinates returned in the RECT structure are expressed as screen coordinates.
Returns TRUE if successful, or FALSE otherwise.
The header item must have style HDF_SPLITBUTTON.
Minimum supported client
|Windows Vista [desktop apps only]|
Minimum supported server
|Windows Server 2008 [desktop apps only]|