How to override copy and paste in richtextbox

To override the command functions:

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {  if (keyData == (Keys.Control | Keys.C))  {    //your implementation    return true;  }   else if (keyData == (Keys.Control | Keys.V))  {    //your implementation    return true;  }   else   {    return base.ProcessCmdKey(ref msg, keyData);  }}

And right-clicking is not supported in a Winforms RichTextBox

--EDIT--

Realized too late this was a WPF question. To do this in WPF you will need to attach a custom Copy and Paste handler:

DataObject.AddPastingHandler(myRichTextBox, MyPasteCommand);DataObject.AddCopyingHandler(myRichTextBox, MyCopyCommand);private void MyPasteCommand(object sender, DataObjectEventArgs e){    //do stuff}private void MyCopyCommand(object sender, DataObjectEventArgs e){    //do stuff}

What about Cut while using Copy and Paste Handlers? When you have your custom implementation of OnCopy and you handle it by

e.Handled = true;e.CancelCommand();

OnCopy is also called when doing Cut - I can't find the way to find out whether method was called to perform copy or cut.

I used this:
//doc.Editor is the RichtextBox

 DataObject.AddPastingHandler(doc.Editor, new DataObjectPastingEventHandler(OnPaste)); DataObject.AddCopyingHandler(doc.Editor, new DataObjectCopyingEventHandler(OnCopy));    private void OnPaste(object sender, DataObjectPastingEventArgs e)    {     }    private void OnCopy(object sender, DataObjectCopyingEventArgs e)    {    }