Running in full screen mode!

Howdy!

Just a quickie, im working on the basics of a game engine for my final year project.

I know howto get into full screen mode using OpenGL, but, what i want is a way to get into full screen mode in standard software mode.

So basically when the program starts, i want it to go into full screen software mode, and ill let the user choose the display options by clicking on bitmaps.

I intend to let the user choose between directx or opengl.

Thanks.