HDN_BEGINDRAG (Compact 2013)

  • Article

3/28/2014

This message is sent by a header control when a drag operation has begun on one of its items. It is sent only by header controls set to the HDS_DRAGDROP style, and is sent as a WM_NOTIFY message.

Syntax

HDN_BEGINDRAG pNMHeader = (LPNMHEADER) lParam;

Parameters

  • pNMHeader
    Pointer to an NMHEADER structure that contains data about the header item dragged.

Return Value

To enable the header control to automatically manage drag-and-drop operations, return FALSE. If the owner of the control is manually performing drag-and-drop reordering, return TRUE.

Remarks

A header control defaults to automatically managing drag-and-drop reordering. Returning TRUE to indicate external (manual) drag-and-drop management enables the owner of the control to provide custom services as part of the drag-and-drop process.

Requirements

Header

commctrl.h

See Also

Reference

Header Controls Notifications
WM_NOTIFY
NMHEADER