[python-win32] Help on using win32api.SendMessage to send keystrokes

Tim Roberts timr at probo.com
Tue Apr 5 19:55:33 CEST 2005

Daniel F wrote:

>How about getkeyboardstate/setkeyboardstate functions, put together
>with attachthreadinput? would that be on the keyboard driver level,
>above directinput? or still below it, and thus bypassed?

Actually, after doing some more reading, there may be a way to do what 
you want with the SendInput API.  I don't see SendInput in any of the 
Win32 wrappers in Python, but you should be able to access it with 
ctypes.  Here's a link to some C# code that demonstrates it:


Note that this wants scan codes, not virtual keys.

>Also... why don't i really want to do the kernel filter drivers? They
>certainly sound like i dont want to do them :) but i wonder why. Too
>involved and painful? Chance to screw up the whole system?

The kernel world is a strange and magical one.  The learning curve is 
steep, and the environment is unforgiving.  If you make a mistake in a 
Python app, you get an exception and you try again.  If you make a 
mistake in a kernel driver, you get a bluescreen and you reboot, and you 
hope that the NTFS file system remembered to flush the pending changes 
to disk.

I write drivers for a living.

- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.

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