skinChatRichTextBox 关于滚动条问题

临时的解决方案，继承SkinChatRichTextBox，在派生类加上：

[C#] 纯文本查看 复制代码

#region 滚动条移动

        public const int WM_HSCROLL = 276;
        public const int WM_VSCROLL = 277;
        public const int WM_SETCURSOR = 32;
        public const int WM_MOUSEWHEEL = 522;
        public const int WM_MOUSEMOVE = 512;
        public const int WM_MOUSELEAVE = 675;
        public const int WM_MOUSELAST = 521;
        public const int WM_MOUSEHOVER = 673;
        public const int WM_MOUSEFIRST = 512;
        public const int WM_MOUSEACTIVATE = 33;

        // Scroll Bar Constants
        private const int SB_HORZ = 0;
        private const int SB_VERT = 1;
        private const int SB_CTL = 2;
        private const int SB_BOTH = 3;

        [DllImport("user32.dll")]
        public static extern int ShowScrollBar(IntPtr hwnd, int wBar, int bShow);

        protected override void WndProc(ref Message m)
        {
            if (m.Msg == WM_VSCROLL)
            {
                ShowScrollBar(this.Handle, SB_VERT, 0);
                ShowScrollBar(this.Handle, SB_VERT, 1);
            }else if(m.Msg== WM_HSCROLL)
            {
                ShowScrollBar(this.Handle, SB_HORZ, 0);
                ShowScrollBar(this.Handle, SB_HORZ, 1);
            }
            base.WndProc(ref m);
        }

        #endregion