C # Global override command CTRL + V using global keyboard

Question

TL DR: How to redefine the functionality of Windows, or at least perform an action BEFORE this happens? It seems that global hooks are not fast enough to happen before

I have a problem with some code I'm working on ... I'm trying to override the natural behavior of Windows when I press CTRL + V, instead of pasting from the clipboard, I would, for example, replace the contents of the clipboard with the contents of my program designations.

NOTE THIS NEEDS TO BE APPLIED IN EXISTING ACTIONS OUTSIDE MY PROGRAM, WELL, THE PRESENT USE OF GLOBAL HOOKS

below is a snippet of how I am currently trying to “intercept” the paste hot keys and explain why this does not work:

Here I define my global hooks:

class globalKeyboardHook {
        #region Constant, Structure and Delegate Definitions
        /// <summary>
        /// defines the callback type for the hook
        /// </summary>
        public delegate int keyboardHookProc(int code, int wParam, ref keyboardHookStruct lParam);

    public struct keyboardHookStruct {
        public int vkCode;
        public int scanCode;
        public int flags;
        public int time;
        public int dwExtraInfo;
    }

    const int WH_KEYBOARD_LL = 13;
    const int WM_KEYDOWN = 0x100;
    const int WM_KEYUP = 0x101;
    const int WM_SYSKEYDOWN = 0x104;
    const int WM_SYSKEYUP = 0x105;
    #endregion

    #region Instance Variables
    /// <summary>
    /// The collections of keys to watch for
    /// </summary>
    public List<Keys> HookedKeys = new List<Keys>();
    /// <summary>
    /// Handle to the hook, need this to unhook and call the next hook
    /// </summary>
    IntPtr hhook = IntPtr.Zero;
    #endregion

    #region Events
    /// <summary>
    /// Occurs when one of the hooked keys is held
    /// </summary>
    public event KeyEventHandler KeyDown;
    /// <summary>
    /// Occurs when one of the hooked keys is released
    /// </summary>
    public event KeyEventHandler KeyUp;
    #endregion

    #region Constructors and Destructors
    /// <summary>
    /// Initializes a new instance of the <see cref="globalKeyboardHook"/> class and installs the keyboard hook.
    /// </summary>
    public globalKeyboardHook() {
        hook();
    }

    /// <summary>
    /// Releases unmanaged resources and performs other cleanup operations before the
    /// <see cref="globalKeyboardHook"/> is reclaimed by garbage collection and uninstalls the keyboard hook.
    /// </summary>
    ~globalKeyboardHook() {
        unhook();
        Dispose();
    }


    #endregion

    #region Public Methods
    /// <summary>
    /// Installs the global hook
    /// </summary>
    public void hook() {
        IntPtr hInstance = LoadLibrary("User32");
        hhook = SetWindowsHookEx(WH_KEYBOARD_LL, hookProc, hInstance, 0);
    }
    public void Dispose()
    {
        try { unhook(); }
        catch (Exception e)
        { }
    }
    /// <summary>
    /// Uninstalls the global hook
    /// </summary>
    public void unhook() {
        UnhookWindowsHookEx(hhook);
    }
    /// <summary>
    /// The callback for the keyboard hook
    /// </summary>
    /// <param name="code">The hook code, if it isn't >= 0, the function shouldn't do anyting</param>
    /// <param name="wParam">The event type</param>
    /// <param name="lParam">The keyhook event information</param>
    /// <returns></returns>
    public int hookProc(int code, int wParam, ref keyboardHookStruct lParam) {
        if (code >= 0) {
            Keys key = (Keys)lParam.vkCode;
            if (HookedKeys.Contains(key)) {
                KeyEventArgs kea = new KeyEventArgs(key);
                if ((wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) && (KeyDown != null)) {
                    KeyDown(this, kea) ;
                } else if ((wParam == WM_KEYUP || wParam == WM_SYSKEYUP) && (KeyUp != null)) {
                    KeyUp(this, kea);
                }
                if (kea.Handled)
                    return 1;
            }
        }
        return CallNextHookEx(hhook, code, wParam, ref lParam);
    }
    #endregion

    #region DLL imports
    /// <summary>
    /// Sets the windows hook, do the desired event, one of hInstance or threadId must be non-null
    /// </summary>
    /// <param name="idHook">The id of the event you want to hook</param>
    /// <param name="callback">The callback.</param>
    /// <param name="hInstance">The handle you want to attach the event to, can be null</param>
    /// <param name="threadId">The thread you want to attach the event to, can be null</param>
    /// <returns>a handle to the desired hook</returns>
    [DllImport("user32.dll")]
    static extern IntPtr SetWindowsHookEx(int idHook, keyboardHookProc callback, IntPtr hInstance, uint threadId);

    /// <summary>
    /// Unhooks the windows hook.
    /// </summary>
    /// <param name="hInstance">The hook handle that was returned from SetWindowsHookEx</param>
    /// <returns>True if successful, false otherwise</returns>
    [DllImport("user32.dll")]
    static extern bool UnhookWindowsHookEx(IntPtr hInstance);

    /// <summary>
    /// Calls the next hook.
    /// </summary>
    /// <param name="idHook">The hook id</param>
    /// <param name="nCode">The hook code</param>
    /// <param name="wParam">The wparam.</param>
    /// <param name="lParam">The lparam.</param>
    /// <returns></returns>
    [DllImport("user32.dll")]
    static extern int CallNextHookEx(IntPtr idHook, int nCode, int wParam, ref keyboardHookStruct lParam);

    /// <summary>
    /// Loads the library.
    /// </summary>
    /// <param name="lpFileName">Name of the library</param>
    /// <returns>A handle to the library</returns>
    [DllImport("kernel32.dll")]
    static extern IntPtr LoadLibrary(string lpFileName);
    #endregion
}

And here is the main question:

   globalKeyboardHook gkh = new globalKeyboardHook();
   bool Vpressed;
   bool controlIsUp;
   void gkh_KeyUp(object sender, KeyEventArgs e)
    {
        //Control was released, handle any hotkeys that need handling
        if(e.KeyCode.ToString()=="LControlKey" || e.KeyCode.ToString()=="RControlKey")
        {
            //scan paste
            if(Vpressed && !controlIsUp)
            {
                Clipboard.SetDataObject(myTextLine);
                Vpressed=false;
                controlIsUp = true;
            }
        }
        if (e.KeyCode.ToString() == "V")
        {
            if(controlIsUp)Vpressed=false;
            else Vpressed=true;
        }
    }


    void gkh_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode.ToString()=="LControlKey" || e.KeyCode.ToString()=="RControlKey") 
        {
            controlIsUp=false;
        }     
    }

So I see that the system pastes what is on the clipboard before pressing the call "Clipboard.setDataObjec (...)" when I want the contents of the clipboard to SET before the system pastes them.

Also, my next step is to detect # times when the V key is pressed before CTRL is released, and insert another message based on this (for example, CTL + V inserts "HI FRIEND", CTRL + V + V paste "TEST TEST 2 ', and CTRL + V + V + V inserts the "third fragment")

, : , , ? - / , , CTRL + V? , "" (.. , , ), , ?

Answer 1

. , . , keyup/down. , ctrl-v alt-f4, , .

protected override bool ProcessDialogKey(Keys keyData)
{

if (keyData == Keys.Alt + Keys.F4) {
    string s = HelixMessageBox.ShowInptDlg("Yeahhhhh, right.  You can shut me down like a normal person, tyvm.", CustomMessageBoxButtons.OK);
    return Keys.Alt;
    }
return base.ProcessDialogKey(keyData);
}