Uhh... File>New Interface file(.dmf) and double click on a window. Click on the Button button and then click in the grid to put it there. Then in the Options tab while editing the button, you can change things like text and what it does.
K i got how to change look of button and make it do stuff i think, how do i make a window pop up when i want it to, cause i deffined window1 but when i run that is the thing with map and whatnot
What type of button, Interface or HTML?
What is the purpose for it (so we can provide a better alternative, if one exists)?