typedef struct tagDELETEITEMSTRUCT {
WORD CtlType
WORD CtlID;
WORD itemID;
HWND hwndItem;
DWORD itemData;
} DELETEITEMSTRUCT;
The DELETEITEMSTRUCT structure describes a deleted owner-draw list-box or combo-box item. When an item is removed from the list box or combo box, or when the list box or combo box is destroyed, Windows sends the WM_DELETEITEM message to the owner for each deleted item along with a pointer to this structure. For more information, see CWnd::OnDeleteItem.
CtlType
Contains ODT_LISTBOX (which specifies an owner-draw list box) or ODT_COMBOBOX (which specifies an owner-draw combo box).
CtlID
Contains the control ID for the list box or combo box.
itemID
Contains the index of the item in the list box or combo box being removed.
hwndItem
Contains the window handle of the control.
itemData
Contains the owner-defined value that was assigned to this item when it was created.