Hooking windowsmessages with python

[Kevin Osthoff]

Hi!

I'm trying to set a message hook with python to catch WM_DROPFILES.
The guiframework is Tkinter.
Here a code snippet:

hwnd = eval(self.wm_frame())
win32gui.DragAcceptFiles(hwnd,1)
wnd = win32ui.CreateWindowFromHandle(hwnd)
wnd.HookMessage(self.test,w32con.WM_DROPFILES)

def test(self):
print "blala"

The DragAcceptFiles-Call seems to be alright. When i drag a file over
the gui there is this drag-and-drop icon. But the problem is, that the
callback-function (test) is never executed.
I also try different messages like Mousemove or Buttondown. So i think
there is a problem with the HookMessage function.
I read that you must compile Python with PYWIN_WITH_WINDOWPROC option
enabled. Is this the problem?

Can someone give me a short working code to hook a message so i can try
it on my workstation?

Thx in advance!

 

[Aaron Brady]

Hi!

I'm trying to set a message hook with python to catch WM_DROPFILES.
The guiframework is Tkinter.
Here a code snippet:


The DragAcceptFiles-Call seems to be alright. When i drag a file over
the gui there is this drag-and-drop icon. But the problem is, that the
callback-function (test) is never executed.
I also try different messages like Mousemove or Buttondown. So i think
there is a problem with the HookMessage function.
I read that you must compile Python with PYWIN_WITH_WINDOWPROC option
enabled. Is this the problem?

Can someone give me a short working code to hook a message so i can try
it on my workstation?

Thx in advance!

I've done some hooks in C. If no one has a simpler way, I can help
you build a DLL to do it, and call it from Python.

 

[Mike Driscoll]

Hi!

I'm trying to set a message hook with python to catch WM_DROPFILES.
The guiframework is Tkinter.
Here a code snippet:


The DragAcceptFiles-Call seems to be alright. When i drag a file over
the gui there is this drag-and-drop icon. But the problem is, that the
callback-function (test) is never executed.
I also try different messages like Mousemove or Buttondown. So i think
there is a problem with the HookMessage function.
I read that you must compile Python with PYWIN_WITH_WINDOWPROC option
enabled. Is this the problem?

Can someone give me a short working code to hook a message so i can try
it on my workstation?

Thx in advance!

I recommend re-posting to the PyWin32 mailing list where the creators
of this package lurk. They'll probably be able to give you some
advice:

http://mail.python.org/mailman/listinfo/python-win32

Mike

 

[Kevin Osthof]

I recommend re-posting to the PyWin32 mailing list where the creators
of this package lurk. They'll probably be able to give you some
advice:

http://mail.python.org/mailman/listinfo/python-win32

Ok. I will try this.

 

[Kevin Osthof]

I've done some hooks in C. If no one has a simpler way, I can help
you build a DLL to do it, and call it from Python.

Thx for the offer but i will try to do it in python first.