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.
See Also