I have read this example http://radeditor.codeplex.com/wikipage?title=OnClientPasteExample and have managed to get this working. The problem is that in the editor configuration there is only the "Command Executing" and "Paste HTML" events. I want to use "OnClientLoad" event. How do i go about doing that?

BTW what i really want is to add an onkeyup event but according to the radEditor doc i need to use

function onclientload(editor, args) {

        editor.attacheventhandler("onkeyup", function (e) {

              //code goes here

        });

}

<dnn:TextEditor ID="textEditor" OnClientInit="OnClientInit" runat="server" />

but no luck

Thomas, I did something very close to what you were trying to do and here's what I came up with.

Instead of adding the OnClientLoad to the RadEditor tag, I just attached a function to the very end of the page load and connected it there.

// Attach a handler to the load event. - must load after everything else
Sys.Application.add_load(CreateContextMenu);

// Add the event handler
function CreateContextMenu() {
    var editor = $find("theEditorId");
    editor.attachEventHandler ("oncontextmenu", function (e)
    {
      var oSelection = editor.getSelectedElement();
      if(oSelection.tagName == "IMG")
      {
          // do stuff
         $telerik.cancelRawEvent(e);
          return false; //disable the browser's context menu
      }
   });
}

This way I didn't have to touch any core code.  Hope it helps.