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NM_CUSTOMDRAW (rebar) notification code

  • Artykuł

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

NM_CUSTOMDRAW

    lpNMCustomDraw = (LPNMCUSTOMDRAW) lParam;

Parameters

lParam

Pointer to an NMCUSTOMDRAW structure that contains information about the drawing operation. The dwItemSpec member of this structure contains the identifier of the band being drawn. The lItemlParam member of this structure contains the lParam of the band 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.

Return code Description
CDRF_DODEFAULT
 The control will draw itself. It will not send any additional NM_CUSTOMDRAW notifications 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 codes 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
 The control will notify the parent of any item-related drawing operations. It will send NM_CUSTOMDRAW notification codes before and after drawing items. This occurs when dwDrawStage equals CDDS_PREPAINT.
CDRF_NEWFONT
 The application specified a new font for the item; the control will use the new font. For more information about changing fonts, see Changing fonts and colors. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.
CDRF_SKIPDEFAULT
 The application drew the item manually. The control will not draw the item. This occurs when dwDrawStage equals CDDS_ITEMPREPAINT.

Requirements

Requirement Value
Minimum supported client
 Windows Vista [desktop apps only]
Minimum supported server
 Windows Server 2003 [desktop apps only]
Header
Commctrl.h

See also

Using Custom Draw