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CDDS_PREERASE notification in CListCtrl

Posted on 2004-09-06
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Last Modified: 2013-11-20
How can I catch the CDDS_PREERASE notification in a CListCtrl? I am assuming that a return of CDRF_SKIPDEFAULT will stop the CListCtrl from erasing its contents before I start any custom drawing.
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Question by:gunaro
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AndyAinscow earned 250 total points
ID: 11989473
About Custom Draw Notification Messages
All common controls that support custom draw send NM_CUSTOMDRAW notification messages at specific points during drawing operations. These notifications describe drawing operations that apply to the entire control as well as drawing operations specific to items within the control. Like many notification messages, NM_CUSTOMDRAW notifications are sent as WM_NOTIFY messages.

The lParam parameter of a custom draw notification message will be the address of an NMCUSTOMDRAW structure or a control-specific structure that contains an NMCUSTOMDRAW structure as its first member. The following table illustrates the relationship between the controls and the structures they use.

Structure  Used by
NMCUSTOMDRAW Rebar, trackbar, and header controls
NMLVCUSTOMDRAW  List-view controls
NMTBCUSTOMDRAW  Toolbar controls
NMTTCUSTOMDRAW  ToolTip controls
NMTVCUSTOMDRAW  Tree-view controls


I think what you require is to trap the notify message about custom draw, then in the NMCUSTOMDRAW structure check the dwDrawStage member for being set to CDDS_PREERASE.
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