CtlType

Unsigned integer that specifies the control type. It can be one of the following values.

Value	Description
ODT_BUTTON	Owner-drawn button
ODT_LISTVIEW	Owner-draw list view control
ODT_MENU	Owner-drawn menu
ODT_TAB	Tab control

CtlID

Unsigned integer that specifies the identifier of the combo box, list box, or button. This member is not used for a menu.

itemID

Unsigned integer that specifies the menu item identifier for a menu item or the index of the item in a list box or combo box. For an empty list box or combo box, this member can be –1. This value allows the application to draw only the focus rectangle at the coordinates specified by the rcItemmember, even though the control contains no items. This focus rectangle indicates to the user whether the list box or combo box has the focus. The value of the itemActionmember determines whether the rectangle is to be drawn as though the list box or combo box has the focus.

itemAction

Unsigned integer that specifies the drawing action required. This member can have one or more of the following values.

Value	Description
ODA_DRAWENTIRE	The entire control needs to be drawn.
ODA_FOCUS	The control has lost or gained the keyboard focus. You should check the itemStatemember to determine whether the control has the focus.
ODA_SELECT	The selection status has changed. You should check the itemStatemember to determine the new selection state.

itemState

Unsigned integer that specifies the visual state of the item after the current drawing action takes place. It can be a combination of the following values.

Value	Description
ODS_CHECKED	The menu item is to be checked. Use this value only in a menu.
ODS_COMBOBOXEDIT	The drawing takes place in the edit control of an owner-drawn combo box.
ODS_DEFAULT	The item is the default item.
ODS_DISABLED	The item is to be drawn as disabled.
ODS_FOCUS	The item has the keyboard focus.
ODS_GRAYED	The item is to be grayed. Use this value only in a menu.
ODS_SELECTED	The status of the menu item is selected.

hwndItem

Handle to the control for combo boxes, list boxes, buttons, and static controls. For menus, this member is a handle to the menu containing the item.

hDC

Handle to a device context. You must use this device context when performing drawing operations on the control.

rcItem

RECTstructure that specifies a rectangle that defines the boundaries of the control to be drawn. This rectangle is in the device context that you specified with the hDCmember. The OS automatically clips anything that the owner window draws in the device context for combo boxes, list boxes, and buttons, but does not clip menu items. When drawing menu items, the owner window must not draw outside the boundaries of the rectangle defined by the rcItemmember.

itemData

Pointer to an unsigned long that specifies the application-defined 32-bit value associated with the menu item. For a control, this member specifies the value last assigned to the list box or combo box by the LB_SETITEMDATAor CB_SETITEMDATAmessage. If the list box or combo box has the LB_HASSTRINGS or CB_HASSTRINGS style, this value is initially zero. Otherwise, this value is initially the value passed to the list box or combo box in the lParamparameter of one of the following messages:

• CB_ADDSTRING
  
  
• CB_INSERTSTRING
  
  
• LB_ADDSTRING
  
  
• LB_INSERTSTRING
  
  

If CtlTypeis ODT_BUTTON, itemDatais zero.

The owner window of the owner-drawn control or menu item receives a pointer to this structure as the lParamparameter of the WM_DRAWITEMmessage.