NM_CUSTOMDRAW (header) Notification ()

NM_CUSTOMDRAW (header) Notification

NM_CUSTOMDRAW (header) Notification

Sent by a header control to notify its parent window about drawing operations. This notification is sent in the form of a WM_NOTIFY message.

Syntax

NM_CUSTOMDRAW

    lpNMCustomDraw = (LPNMCUSTOMDRAW) lParam;

Parameters

lpNMCustomDraw
A pointer to an NMCUSTOMDRAW structure that contains information about the drawing operation. The dwItemSpec member of this structure contains the index of the item being drawn and the lItemlParam member of this structure contains the item's lParam.

Return Value

The value your application can return depends on the current drawing stage. The dwDrawStage member of the associated NMCUSTOMDRAW structure holds a value that specifies the drawing stage. You must return one of the following values.
CDRF_DODEFAULT The control will draw itself. It will not send any additional NM_CUSTOMDRAW messages for this paint cycle. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYITEMDRAW The control will notify the parent of any item-related drawing operations. It will send NM_CUSTOMDRAW notification messages before and after drawing items. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYITEMERASE The control will notify the parent when an item will be erased. It will send NM_CUSTOMDRAW notification messages before and after erasing items. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYPOSTERASE The control will notify the parent after erasing an item. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYPOSTPAINT The control will notify the parent after painting an item. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYSUBITEMDRAW Shell and Common Controls Versions. The control will notify the parent when a list-view subitem is being drawn. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NEWFONT Your application specified a new font for the item; the control will use the new font. For more information on changing fonts, see Changing fonts and colors. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
CDRF_SKIPDEFAULT Your application drew the item manually. The control will not draw the item. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.

Remarks

See Using Custom Draw for further discussion.

Notification Requirements

Minimum DLL Version comctl32.dll version 4.70 or later
Header commctrl.h
Minimum operating systems Windows 2000, Windows NT 4.0 with Internet Explorer 3.0, Windows 98, Windows 95 with Internet Explorer 3.02

CDRF_DODEFAULT	The control will draw itself. It will not send any additional NM_CUSTOMDRAW messages for this paint cycle. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYITEMDRAW	The control will notify the parent of any item-related drawing operations. It will send NM_CUSTOMDRAW notification messages before and after drawing items. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYITEMERASE	The control will notify the parent when an item will be erased. It will send NM_CUSTOMDRAW notification messages before and after erasing items. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYPOSTERASE	The control will notify the parent after erasing an item. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYPOSTPAINT	The control will notify the parent after painting an item. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NOTIFYSUBITEMDRAW	Shell and Common Controls Versions. The control will notify the parent when a list-view subitem is being drawn. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NEWFONT	Your application specified a new font for the item; the control will use the new font. For more information on changing fonts, see Changing fonts and colors. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
CDRF_SKIPDEFAULT	Your application drew the item manually. The control will not draw the item. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.

Minimum DLL Version	comctl32.dll version 4.70 or later
Header	commctrl.h
Minimum operating systems	Windows 2000, Windows NT 4.0 with Internet Explorer 3.0, Windows 98, Windows 95 with Internet Explorer 3.02