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NMCUSTOMDRAW structure (commctrl.h)

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Contains information specific to an NM_CUSTOMDRAW notification code.

Syntax

typedef struct tagNMCUSTOMDRAWINFO {
  NMHDR     hdr;
  DWORD     dwDrawStage;
  HDC       hdc;
  RECT      rc;
  DWORD_PTR dwItemSpec;
  UINT      uItemState;
  LPARAM    lItemlParam;
} NMCUSTOMDRAW, *LPNMCUSTOMDRAW;

Members

hdr

Type: NMHDR

An NMHDR structure that contains information about this notification code.

dwDrawStage

Type: DWORD

The current drawing stage. This is one of the following values.

Value Meaning
Global Values:
CDDS_POSTERASE
 After the erasing cycle is complete.
CDDS_POSTPAINT
 After the painting cycle is complete.
CDDS_PREERASE
 Before the erasing cycle begins.
CDDS_PREPAINT
 Before the painting cycle begins.
Item-specific Values:
CDDS_ITEM
 Indicates that the dwItemSpec, uItemState, and lItemlParam members are valid.
CDDS_ITEMPOSTERASE
 After an item has been erased.
CDDS_ITEMPOSTPAINT
 After an item has been drawn.
CDDS_ITEMPREERASE
 Before an item is erased.
CDDS_ITEMPREPAINT
 Before an item is drawn.
CDDS_SUBITEM
 Flag combined with CDDS_ITEMPREPAINT or CDDS_ITEMPOSTPAINT if a subitem is being drawn. This will only be set if CDRF_NOTIFYITEMDRAW is returned from CDDS_PREPAINT.

hdc

Type: HDC

A handle to the control's device context. Use this HDC to perform any GDI functions.

rc

Type: RECT

The RECT structure that describes the bounding rectangle of the area being drawn. This member is initialized only by the CDDS_ITEMPREPAINT notification. Version 5.80. This member is also initialized by the CDDS_PREPAINT notification.

dwItemSpec

Type: DWORD_PTR

The item number. What is contained in this member will depend on the type of control that is sending the notification. See the NM_CUSTOMDRAW notification reference for the specific control to determine what, if anything, is contained in this member.

uItemState

Type: UINT

The current item state. This value is a combination of the following flags.

Value Meaning
CDIS_CHECKED
 The item is checked.
CDIS_DEFAULT
 The item is in its default state.
CDIS_DISABLED
 The item is disabled.
CDIS_FOCUS
 The item is in focus.
CDIS_GRAYED
 The item is grayed.
CDIS_HOT
 The item is currently under the pointer ("hot").
CDIS_INDETERMINATE
 The item is in an indeterminate state.
CDIS_MARKED
 The item is marked. The meaning of this is determined by the implementation.
CDIS_SELECTED
 The item is selected.
Note  This flag does not work correctly for owner-drawn list-view controls that have the LVS_SHOWSELALWAYS style. For these controls, you can determine whether an item is selected by using LVM_GETITEMSTATE (or ListView_GetItemState) and checking for the LVIS_SELECTED flag.
 
CDIS_SHOWKEYBOARDCUES

Version 6.0.The item is showing its keyboard cues.

Note that Comctl32 version 6 is not redistributable. operating systems. To use Comctl32.dll version 6, specify it in the manifest. For more information on manifests, see Enabling Visual Styles.
CDIS_NEARHOT
 The item is part of a control that is currently under the mouse pointer ("hot"), but the item is not "hot" itself. The meaning of this is determined by the implementation.
CDIS_OTHERSIDEHOT
 The item is part of a splitbutton that is currently under the mouse pointer ("hot"), but the item is not "hot" itself. The meaning of this is determined by the implementation.
CDIS_DROPHILITED
 The item is currently the drop target of a drag-and-drop operation.

lItemlParam

Type: LPARAM

Application-defined item data.

Remarks

The value your application returns depends on the current drawing stage. The dwDrawStage member of the associated NMCUSTOMDRAW structure holds a value that specifies the drawing stage. When the dwDrawStage member equals CDDS_PREPAINT and CDDS_PREERASE, some controls send the CDDS_PREERASE message first and expect the return value to indicate which subsequent messages will be sent. For a code sample that illustrates states and drawing stages, see Customizing a Control's Appearance Using Custom Draw.

Requirements

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