From: awertyui@...
Date: 2005-06-07T05:01:46+09:00
Subject: Ruby DL callback function for a windowProc

I am trying to create a window class with ruby dl so I can create my
own window but I'm stuck on the wndproc.  here is what I have so far
but it doesn't work.
I can get it to work if I use one of the standard window classes like
Button but if I do that then I dont have control over the wndproc which
seems to be getting the messages I am trying to recieve.

There is more to the code I just cut out the parts with the problem.
module Win32
  extend DL::Importable
  dlload 'user32.dll' , 'kernel32.dll'
WNDCLASSEX = struct [
    "UINT cbSize",
    "UINT style",
    "void* lpfnWndProc",
    "int cbClsExtra",
    "int cbWndExtra",
    "UINT hInstance1",
    "UINT hIcon",
    "UINT hCursor",
    "UINT hbrBackground",
    "LPCSTR lpszMenuName",
    "LPCSTR lpszClassName",
    "UINT hIconSm"

  ]

def my_proc(hwnd,uMsg,wParam,lParam)
    puts "TEST"
end

MY_PROC = callback 'UINT my_proc(HWND,UINT,WPARAM,LPARAM)'
end


#this is the line that the program stops on.
wndclass.lpfnWndProc = Win32::MY_PROC

this is the error 
type mismatch
(eval):16:in `[]='