typedef struct tagDRAWITEMSTRUCT { /* ditm */
UINT CtlType;
UINT CtlID;
UINT itemID;
UINT itemAction;
UINT itemState;
HWND hwndItem;
HDC hDC;
RECT rcItem;
DWORD itemData;
} DRAWITEMSTRUCT;The DRAWITEMSTRUCT structure provides information the owner needs to determine how to paint an owner-drawn control. The owner of the owner-drawn control receives a pointer to this structure as the lParam parameter of the WM_DRAWITEM message.
CtlType
Specifies the control type. The values for control types follow:
| Value | Meaning |
| ODT_BUTTON | Owner-drawn button |
| ODT_COMBOBOX | Owner-drawn combo box |
| ODT_LISTBOX | Owner-drawn list box |
| ODT_MENU | Owner-drawn menu |
CtlID
Specifies the control identifier for a combo box, list box or button. This member is not used for a menu.
itemID
Specifies the menu-item identifier for a menu or the index of the item in a list box or combo box. For an empty list box or combo box, this member is a negative value. 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 input focus. The itemAction member determines whether the rectangle is to be drawn as though the list box or combo box has input focus.
itemAction
Specifies the drawing action required. This member is one or more of the following values:
| Value | Meaning |
| ODA_DRAWENTIRE | Bit is set when the entire control needs to be drawn. |
| ODA_FOCUS | Bit is set when the control gains or loses input focus. The itemState member should be checked to determine whether the control has focus. |
| ODA_SELECT | Bit is set when only 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; that is, if a menu item is to be grayed, the state flag ODS_GRAYED will be set. Following are the state flags:
| Value | Meaning |
| ODS_CHECKED | Bit is set if the menu item is to be checked. This bit is used only in a menu. |
| ODS_DISABLED | Bit is set if the item is to be drawn as disabled. |
| ODS_FOCUS | Bit is set if the item has input focus. |
| ODS_GRAYED | Bit is set if the item is to be grayed. This bit is used only in a menu. |
| ODS_SELECTED | Bit is set if the item's status is selected. |
hwndItem
Specifies the window handle of the control for combo boxes, list boxes, and buttons. For menus, it contains the handle of the menu (HMENU) containing the item.
hDC
Identifies a device context; this device context must be used when performing drawing operations on the control.
rcItem
Specifies a rectangle in the device context identified by the hDC member that defines the boundaries of the control to be drawn. Windows automatically clips anything the owner draws in the device context for combo boxes, list boxes, and buttons, but it does not clip menu items. When drawing menu items, it must ensure that the owner does not draw outside the boundaries of the rectangle defined by the rcItem member.
itemData
Contains the value last assigned to the list box or combo box by an LB_SET-ITEMDATA 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: