Switch Pictures!

Okay what I have done is I made a program that patches, and updates the this other program. When you open the program it checks to see if you have the most current updated version, if you dont I want a Red X to display, and if you are up to date I want a Green Check mark to display. I already have the pictures same size and everything. But am unsure how I could add that into a If Statment or even were to start. Below is a picture of what i am talking about.

Kinda having writers block unsure how to start it.

Thanks for all the help!

http://i51.photobucket.com/albums/f3...ky/Example.jpg