Software keyboard

[maxxx_77]

Hello. I'm a newbye of Python.
I'm looking for a way of coding a virtual keyboard similar to the one
that comes with Windows (Accessories -> Accessibility -> On Screen
Keyboard).
What I would like to do is make one which is a lot larger and add
transparency to it.
I've a first version in which I used TKinter and Pythonwin.
Can anyone provide me with a snipet of code which would explain how to
send characters to other applications?
The first difficulty that I have is to find which application is active
and has the focus. I think that my keyboard application must be
modeless and cannot receive the focus. But how?
Please help me.
Bye.