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LB_ADDSTRING Overview  Group

An application sends an LB_ADDSTRING message to add a string to a list box. If the list box does not have the LBS_SORT style, the string is added to the end of the list. Otherwise, the string is inserted into the list and the list is sorted.

LB_ADDSTRING 

wParam = 0;                         // not used; must be zero 

lParam = (LPARAM) (LPCTSTR) lpsz;   // address of string to add 

 

Parameters

lpsz
Value of lParam. Points to the null-terminated string that is to be added.

If you create the list box with an owner-drawn style but without the LBS_HASSTRINGS style, the value of the lpsz parameter is stored as item data instead of the string it would otherwise point to. You can send the LB_GETITEMDATA and LB_SETITEMDATA messages to retrieve or modify the item data.

Return Values

The return value is the zero-based index of the string in the list box. If an error occurs, the return value is LB_ERR. If there is insufficient space to store the new string, the return value is LB_ERRSPACE.

Remarks

If you create an owner-drawn list box with the LBS_SORT style but not the LBS_HASSTRINGS style, the system sends the WM_COMPAREITEM message one or more times to the owner of the list box to place the new item properly in the list box.

See Also

LB_DELETESTRING, LB_INSERTSTRING, LB_SELECTSTRING, WM_COMPAREITEM

See also:


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