HI ..,
i think you can achive this by using send keys , see the CP article in
the below link.., you have to made your own application by using this wrappers
Sending Keystrokes to another Application in C#[
^]
First you have to active the window(third party application).
<pre lang="midl">int iHandle = NativeWin32.FindWindow(null, txtTitle.Text);
NativeWin32.SetForegroundWindow(iHandle);
see the above code block how to active the window of third party application. then send the TAB keys to focus the text box which you want. select the text and copy to clip board, then activate your c# application paste it where you want. (selection and copy also you can done with SEND KEYS).
This solution will not help you 100%, but you will get an idea ..
Thanks & Regards
Rajesh B