CB_GETITEMDATA

An application sends a CB_GETITEMDATA message to a combo box to retrieve the application-supplied 32-bit value associated with the specified item in the combo box.

CB_GETITEMDATA 
wParam = (WPARAM) index;  // item index 
lParam = 0;               // not used; must be zero 
 

Parameters

index

Value of wParam. Specifies the zero-based index of the item.

Return Values

The return value is the 32-bit 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 32-bit 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.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winuser.h.

See Also

Combo Boxes Overview, Combo Box Messages, CB_ADDSTRING, CB_INSERTSTRING, CB_SETITEMDATA