I am familiar with DOSbox, however, just bought the KRYNN series in GOG, and it won't run in fullscreen. Have set preferences in the DOSbox config file, but no luck. Running Win 7 32 bit, Nvidia 3D card

Is it running in an actual window (i.e. you can see the Windows background, taskbar... etc.)? If so, pressing Alt+Enter should do it.

Or is it running with black bars or a black border around it? If so, your best bet is to go to NVidia control panel and set scaling to "Aspect ratio" (if you want to maintain the correct ratio) or "Full screen" (which will make it stretched).

Thank You! made the mods you recommended, result is a small window on a black background. Using the alt+enter shows the same small window on the desktop. ARRRG

In NVidia control panel, you also have to make sure "Perform settings on" is set to GPU.

If that doesn't work, what's the resolution of your desktop? In Dosbox conf file, did you try putting it under "fullresolution" e.g. fullresolution=1920x1080.

Thanks Again, had settings for optimizing 3D, resetting control panel worked, specifically setting Nvdia to overide scaling, and selecting full screen. Also ditched my separate DOSbox program.

YAY!
BTW, back in the day, getting these programs to run in DOS was no fun, very picky about soundcards and memory allotment