Emacs LISP Question

[Yakov Nekritch <yasha@theory.cs.uni-bonn.de>]

Hello,

I have the following emacs lisp question. 
How can I implement a  mouse pop-up menu, for a menu defined with 
easy-menu-define?

I was thinking about something like this:


(require 'xcscope )

(defun mouse-popup-cscopemenu ( )
 "Popup a cscope menu."
 (popup-menu  cscope:menu ) )


(define-key c-mode-base-map [S-down-mouse-3]  'mouse-popup-cscopemenu)


And  cscope:menu is defined in  xcscope.el .


However this does not work. When I press Shift-RightMouse I get:

Wrong type argument: commandp, mouse-popup-cscopemenu



Can anybody tell me what is wrong with my approach and how this function should 
be realised?
Any help will be appreciated.


Regards,
Yakov


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