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The following table shows the header controls messages, with a description of the purpose of each.
| Programming element | Description |
|---|---|
| HDM_CREATEDRAGIMAGE | This message creates a transparent version of an item's image within an existing header control. |
| HDM_DELETEITEM | This message deletes an item from a header control. |
| HDM_GETIMAGELIST | This message retrieves the handle to the image list that has been set for an existing header control. |
| HDM_GETITEM | This message retrieves data about an item in a header control. |
| HDM_GETITEMCOUNT | This message retrieves a count of the items in a header control. |
| HDM_GETITEMRECT | This message retrieves the bounding rectangle for a specified item in a header control. |
| HDM_GETORDERARRAY | This message retrieves the current left-to-right order of items in a header control. |
| HDM_HITTEST | This message tests a point to determine which header item, if any, is at the specified point. |
| HDM_INSERTITEM | This message inserts a new item into a header control. |
| HDM_LAYOUT | Retrieves the correct header control size and position within the parent window. |
| HDM_ORDERTOINDEX | This message retrieves an index value for an item based on its order in the header control. |
| HDM_SETHOTDIVIDER | This message changes the divider color between header items to indicate the destination of an external drag-and-drop operation. |
| HDM_SETIMAGELIST | This message assigns an image list to an existing header control. |
| HDM_SETITEM | This message sets the specified item attributes in a header control. |
| HDM_SETORDERARRAY | This message sets the left-to-right order of header items. |
See Also
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