Auto Fill a Windows Form using WPF

I am currently using a windows application in which there are many lengthy forms to be filled out. This is a commercial tool which I have bought so I don't have any access to the code. In order to save the pain of filling these huge forms I wanted to create a WPF application which does some calculations and auto fill the forms for me. So is there any way my WPF a开发者_运维知识库pp can fill the form which is open in the other window?

You can try using Windows Automation API