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เพิ่มแถบเลื่อนแนวนอนใน ListBox [ VB6 ]

Option Explicit Private Declare Function SendMessageByNum Lib "user32" _ Alias "SendMessageA" (ByVal hwnd As Long, ByVal _ wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Const LB_SETHORIZONTALEXTENT =…