The function requires: hWndControl, nIndex and SearchText
FF_ListBox_FindString( ByVal hWndControl As Dword, ByVal nIndex As Long, ByVal SearchText As String ) As Long
However, the function is NOT using the nIndex variable, it's always ZERO
SendMessage( hWndControl, %LB_FINDSTRING, 0, ByVal StrPtr(SearchText))
Same thing for FIND EXACT.