An application sends an LB_INSERTSTRING message to insert a string into a list box. Unlike the LB_ADDSTRING message, the LB_INSERTSTRING message does not cause a list with the LBS_SORT style to be sorted.
LB_INSERTSTRING wParam = (WPARAM) index; // item index lParam = (LPARAM) (LPCTSTR) lpsz; // address of string to insert
Windows 95: The wParam parameter is limited to 16-bit values.
This means list boxes cannot contain more than 32,767 items. Although the
number of items is restricted, the total size in bytes of the items in a
listbox is limited only by available memory.
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.
The return value is the index of the position at which the string was inserted. 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.
|file: /Techref/os/win/api/win32/mess/src/msg10_17.htm, 2KB, , updated: 2000/4/7 12:20, local time: 2022/5/23 00:19,
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