C# SetWindowLong 中的WM_Paste事件怎么获取不了

zyug 2012-04-19 04:45:13

有一个第三方控件Devexpress 的TextEdit
用Spy ++可以看到有 WM_Paste事件，但是用代码却不能得到这个消息

代码如下



       private const int WM_GETTEXT = 0x000d;

        private const int WM_COPY = 0x0301;

        private const int WM_PASTE = 0x0302;

        private const int WM_CONTEXTMENU = 0x007B;

        private const int WM_RBUTTONDOWN = 0x0204;

        public const int WM_CHAR = 0x0102;

        public const int GWL_WNDPROC = -4;





        public delegate IntPtr NewWndProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, NewWndProc wndproc);



        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);

        //没用到

        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern IntPtr GetWindowLong(IntPtr hWnd, int nIndex);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern IntPtr CallWindowProc(IntPtr wndProc, IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);



        private NewWndProc wpr = null;



        //备份的默认处理函数

        private IntPtr oldWndProc = IntPtr.Zero;



 private IntPtr GridControlWndProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)

        {

            IntPtr returnVar = IntPtr.Zero;

            switch (msg)

            {

                case WM_PASTE:                     

                   IDataObject iData = Clipboard.GetDataObject();

                    if (iData.GetDataPresent(DataFormats.Text))

                    {

                                                string str;

                        str = (String)iData.GetData(DataFormats.Text);





                                       

                    }

                    return (IntPtr)0;

              }

            // 回调备份的默认处理的函数 

            returnVar = CallWindowProc(oldWndProc, hWnd, msg, wParam, lParam);

            return returnVar; 

        }





        private void gridView1_ShownEditor(object sender, EventArgs e)

        {

            if (gridView1.ActiveEditor != null&& gridView1.ActiveEditor is DevExpress.XtraEditors.TextEdit)

            {





                oldWndProc = GetWindowLong(textEdit1.Handle, GWL_WNDPROC);

                wpr = new NewWndProc(this.GridControlWndProc);

                oldWndProc = SetWindowLong(textEdit1.Handle, GWL_WNDPROC, wpr);





            }

        }