Instructions
Click the "Start" menu, followed by "All Programs," "DOSBox," "Configuration" and "Edit Configuration." This opens the DOSBox configuration menu.
Scroll to the [sdl] section of the configuration file. The [sdl] section is listed near the top of the file.
Type either true or false after "fullscreen=." True makes "SimAnt" fullscreen, while false forces "SimAnt" into a window on your PC.
Enter the resolution for "SimAnt" under "fullresolution=." For example, if your monitor is 1440 by 900, and you want "SimAnt" to take full advantage of your monitor, enter "fullresolution=1440x900."
Enter the resolution for the windowed mode under "windowresolution=." The size of the resolution entered dictates how big the window is. For example, to set the window resolution at 1280x960, enter "windowresolution=1280x960."
Select "File" at the top of the file, and "Save" to save all changes.
Launch "SimAnt" using DOSBox. The resolution that is displayed is the one you specified in the configuration file.