This notification message is sent to the owner of a header control when the control needs data about a callback header item. It is sent as a WM_NOTIFY message.
At a Glance
| Header file: | Commctrl.h |
| Windows CE versions: | 2.0 and later |
Syntax
HDN_GETDISPINFO pDispInfo = (LPNMHDDISPINFO) lParam;
Parameters
pDispInfo
Pointer to an NMHDDISPINFO structure. On input, the members of the structure specify what data is required and the item of interest.
Remarks
Fill the appropriate members of the structure to return the requested data to the header control. If your message handler sets the mask member of the NMHDDISPINFO structure to HDI_DI_SETITEM, the header control stores the data and will not request it again.