Software for making interface design of a Windows Application

Please share some tools for developing interface diagrams which will be front end of my application. Wanna show just out look of my application.

in short u need to create mocks

I use Axure RP Pro

^looks good.

I am downloading it.

Lets see.

WPF (Windows Presentation Foundation ) and .Net Framework 4 are same thing. Isn't it?

No they are not. .Net is a framework for developing application using MS technologies. WPF is one of the technology.