Hi everyone,

We are having issues with getting a "paste" event being sent up a hierarchy to the parent form.

Using WinXP Sp3,VS 2005 Professional, and .NET 2.0 for development.

We have an application that comprised of multiple solution files which we've inherited. Solution #2 houses all our custom controls. When built, the dll is used as a reference in Solution #4 so those controls can be placed on our multiple forms.

We have a special DoPaste Method in solution #4 which we call whenever a "paste" event happens from a form within Solution #4. This functions perfectly whenever we select "Edit | Paste" from the menu, or use CTRL-V (we just call the menu's paste event).

However, there's also a context menu which allows a user to right-click and paste text into the custom controls. Unfortunately, it's pasting "blanks".

What we want to do is when a user right-clicks to paste, have that bubble up to the forms in Solution #4.

In the custom textbox control in Solution #2, we have the following code:

private const int WM_PASTE = 0x0302;
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern int SendMessage(
        int hWnd, // handle to destination window
        uint Msg, // message
        int wParam, // first message parameter
        int lParam // second message parameter
        );

        /// <summary>
        /// Override WndProc Method : Capture pasting
        /// </summary>
        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case WM_PASTE:
                    {
                        SendMessage((int)Parent.Handle, Convert.ToUInt32(WM_PASTE), WM_PASTE, WM_PASTE);
                        //Have also tried sending to this.Handle instead of Parent.Handle
                        SendMessage((int)Parent.Handle, Convert.ToUInt32(WM_PASTE), WM_PASTE, WM_PASTE);
                        break;
                    }
                default:
                    {
                        base.WndProc(ref m);
                        break;
                    }
            }
        }

This seems to work as tracing through it the SendMessage routine is called.

In Solution #4, we have the following code, which doesn't seem to ever receive the WM_PASTE message if we step through it message by message:

// Pasting
        private const int WM_PASTE = 0x0302;
        /// <summary>
        /// Override WndProc Method : Capture Pasting into ABC123 Text Box
        /// </summary>
        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case WM_PASTE:
                    {
                        DoPaste();
                        break;
                    }
                default:
                    {
                        base.WndProc(ref m);
                        break;
                    }
            }

        }

Questions are:

1) Is this the correct way to do it?

2) If not, what is the correct (or better) way?

3) If so, why wouldthis not be working?

Thanks!

int)this.TopLevelControl.Handle, WM_PASTE, 0, 0);

int)this.TopLevelControl.Handle, WM_PASTE, 0, 0);