This structure provides information the owner window must have to determine how to paint an owner-drawn control or menu item. The owner window of the owner-drawn control or menu item receives a pointer to this structure as the lParam parameter of the WM_DRAWITEM message.
At a Glance
| Header file: | Winuser.h |
| Windows CE versions: | 1.0 and later |
Syntax
typedef struct tagDRAWITEMSTRUCT {
UINT CtlType;
UINT CtlID;
UINT itemID;
UINT itemAction;
UINT itemState;
HWND hwndItem;
HDC hDC;
RECT rcItem;
DWORD itemData;
} DRAWITEMSTRUCT;
Members
CtlType
Specifies the control type. It is one of the following values:
| Value | Description |
| ODT_BUTTON | Owner-drawn button |
| ODT_LISTVIEW | List view control |
| ODT_MENU | Owner-drawn menu item |
| ODT_TAB | Tab control |
CtlID
Specifies the identifier of the combo box, list box, button, or static control. This member is not used for a menu item.
itemID
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 allows the application to draw only the focus rectangle at the coordinates specified by the rcItem member even though there are no items in the control. This indicates to the user whether the list box or combo box has the focus. How the bits are set in the itemAction member determines whether the rectangle is to be drawn as though the list box or combo box has the focus.
itemAction
Specifies the drawing action required. It can be 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. The itemState member should be checked to determine whether the control has the focus. |
| ODA_SELECT | The selection status has changed. The itemState member should be checked to determine the new selection state. |
itemState
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. This bit is used only in a menu. |
| 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. This bit is used only in a menu. |
| ODS_SELECTED | The menu item’s status is selected. |
hwndItem
Handle to the control for combo boxes, list boxes, buttons, and static controls. For menus, this member identifies the menu containing the item.
hDC
Handle to a device context; this device context must be used when performing drawing operations on the control.
rcItem
Specifies a rectangle that defines the boundaries of the control to be drawn. This rectangle is in the device context specified by the hDC member. The system automatically clips anything 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 rcItem member.
itemData
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_SETITEMDATA or CB_SETITEMDATA message. If the list box or combo box has the LBS_HASSTRINGS or CBS_HASSTRINGS style, this value is initially zero. Otherwise, this value is initially the value that was passed to the list box or combo box in the lParam parameter of one of the following messages:
If ctlType is ODT_BUTTON or ODT_STATIC, itemData is zero.
Remarks
Windows CE does not support owner–drawn combo boxes and list boxes.
See Also
CB_ADDSTRING, CB_INSERTSTRING, CB_SETITEMDATA, LB_ADDSTRING, LB_INSERTSTRING, WM_DRAWITEM