An application sends a CB_GETITEMDATA message to a combo box to retrieve the application-supplied value associated with the specified item in the combo box.
Syntax
To send this message, call the
SendMessage
function as follows.
|
lResult = SendMessage(
| // returns LRESULT in lResult
|
| (HWND) hWndControl,
| // handle to destination control
|
| (UINT) CB_GETITEMDATA,
| // message ID
|
| (WPARAM) wParam,
| // = (WPARAM) () wParam; |
| (LPARAM) lParam
| // = 0; not used, must be zero |
|
);
| |
Parameters
- wParam
-
The zero-based index of the item.
- lParam
-
This parameter is not used.
Return Value
The return value is the value associated with the item. If an error occurs, it is CB_ERR.
If the item is in an owner-drawn combo box created without the CBS_HASSTRINGS style, the return value is the value contained in the
lParam parameter of the CB_ADDSTRING or CB_INSERTSTRING message, that added the item to the combo box. If the CBS_HASSTRINGS style was not used, the return value is the
lParam parameter contained in a CB_SETITEMDATA message.
Message Information
| Header | Declared in Winuser.h, include Windows.h |
|---|
| Minimum operating systems |
Windows 95, Windows NT 3.1 |
|---|
See Also