Windows forms, everything inside header file?

[aggsyb]

Hey, I wrote have written quite a few programs in console and I want to start programming Windows Forms, obviously I have alot of working .cpp files but adding buttons (using vc++) the code seems to all be placed inside of those buttons which is the header file.

Do I just program all of the buttons or is there a way to make use of .cpp's ? Sorry if this sounds dumb , my first time trying anything on a windows form.