Changing parameters in .exe file

I currently have a VR environment (say a room full of objects) and by the end of the project I want to turn it into a .exe file but with a window that can be used to change parameters in the environment while someone else is using the headset (e.g. changing the colour of a table). The headset user should not be able to see this window. How do I create this editing window for my .exe file?