I am working on a VSTO Word AddIn project and I copy some paragraph from an external source (some other word doc) and want to paste it by using Ctrl V in word addin. I want to add some more custom functionalities along with the paste operation. how to do that ?

CodePudding user response：

To control the keyboard shortcuts for pasting some data into your document you can set up a keyboard hook using the SetWindowsHookEx Windows API function. For example:

        private const int WH_KEYBOARD_LL = 13;
        private const int WM_KEYDOWN = 0x0100;

        private static IntPtr hookId = IntPtr.Zero;
        private delegate IntPtr HookProcedure(int nCode, IntPtr wParam, IntPtr lParam);
       

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);

        [DllImport("user32.dll", SetLastError = true)]
        private static extern bool UnhookWindowsHookEx(IntPtr hhk);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int idHook, HookProcedure lpfn, IntPtr hMod, uint dwThreadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            hookId = SetHook(HookCallback);
        }

        private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
        {
            UnhookWindowsHookEx(hookId);
        }

        private static IntPtr SetHook(HookProcedure procedure)
        {
            using (Process process = Process.GetCurrentProcess())
            using (ProcessModule module = process.MainModule)
                return SetWindowsHookEx(WH_KEYBOARD_LL, procedure, GetModuleHandle(module.ModuleName), 0);
        }

        private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
        {
            try
            {
                if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
                {
                    int pointerCode = Marshal.ReadInt32(lParam);
                    string pressedKey = ((Keys)pointerCode).ToString();

                    //Do some sort of processing on key press
                    var thread = new Thread(() =>
                    {
                        

                        if (Control.ModifierKeys != 0 && pointerCode == 48 && Keys.Shift != 0)
                        {
                            //    
                            Microsoft.Office.Interop.Word.Selection currentSelection = Application.Selection;
                            if (currentSelection.Type == Word.WdSelectionType.wdSelectionIP)
                            {

                                currentSelection.TypeBackspace();
                                currentSelection.TypeText("()");
                                currentSelection.MoveLeft(1);

                                pointerCode = 0;
                            }
                            else
                                if (currentSelection.Type == Word.WdSelectionType.wdSelectionNormal)
                            {
                                currentSelection.TypeBackspace();
                                currentSelection.MoveLeft(1);
                                currentSelection.TypeText("()");
                                pointerCode = 0;

                            }
                            else
                            {
                                // Do nothing.
                            }
                        }
                        else
                        {

                        }

                    });
                    thread.Start();
                }
                
            }
            catch
            {

            }

            return CallNextHookEx(hookId, nCode, wParam, lParam);
        }

To handle ribbon controls (including context menus) you can repurpose built-in controls. See Temporarily Repurpose Commands on the Office Fluent Ribbon for more information.

CodePudding user response：

You can patch the GetClipboardData Windows API function using Detours and run any code you want in your new function.

Works for both Ctrl V and paste from a popup menu.