摘要： private const int SB_BOTH = 3; private const int WM_NCCALCSIZE = 0x83; [DllImport("user32.dll")] private static extern int ShowScrollBar(IntPtr hWnd, int wBar, int bShow); protected override void WndProc(ref Message m) { if (mdiClient != null) { ShowScrollBar(mdiClient.Handle, SB_BOTH, 0 / 阅读全文