Runing an external program in different solutions

[Faurax]

Hi, I am Faurax and this is what I would like to learn.

Let say I have a program installed on my computer and
I would like to make an application in c++ that runs
it in a different solution.

Example: Program.exe runs in 640x480 and I want
it to run in 800x600 instead.
What is the codes for doing that?

Also, is there a simple code for changing from fullscreen
mode to window mode of an external program?

I am using Windows XP and Dev C++ 4.9.9.2 by the way.

[LB]

What graphics library are you using?

[Faurax]

I am pretty new to writing graphics in c++
and have therefore never used one, I think.