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

Syntax

NMCUSTOMDRAW  *lpNMCustomDraw = (LPNMCUSTOMDRAW) lParam;

Parameters

lpNMCustomDraw

Version 4.70. Pointer to an NMCUSTOMDRAW structure that contains information about the drawing operation. The dwItemSpec member of this structure contains the command identifier of the item being drawn. The lItemlParam member of this structure contains the dwData value for the item being drawn.

Version 4.71. Pointer to an NMTBCUSTOMDRAW structure that contains information about the drawing operation. The dwItemSpec member of the nmcd member of this structure contains the command identifier of the item being drawn. The lItemlParam member of the nmcd member of this structure contains the dwData value for the item being drawn.

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 NMCUSTOMDRAW notification messages before and after drawing 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	Version 4.71. 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.
TBCDRF_BLENDICON	Version 5.00. Blend the button 50 percent with the background. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_NOBACKGROUND	Version 5.00. Don't draw button background. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_NOEDGES	Version 4.71. Don't draw button edges. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_HILITEHOTTRACK	Version 4.71. Use the clrHighlightHotTrack member of the NMTBCUSTOMDRAW structure to draw the background of hot-tracked items. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_NOOFFSET	Version 4.71. Don't offset button when pressed. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_NOMARK	Don't draw default highlight of items that have the TBSTATE_MARKED. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_NOETCHEDEFFECT	Version 4.71. Don't draw etched effect for disabled items. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
TBCDRF_USECDCOLORS	Use custom draw colors to render text regardless of visual style.

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 3.0

See Also

Using Custom Draw