DXWnd is pretty stubborn when it comes to this game. There is a fairly decent way to set everything up, but it has quite a few steps. I'll be trying to explain how to set everything up the best I can.

1. The newer versions of DXWnd do not work properly with this game at all. Make sure to get an older version of DXWnd in order to properly run it. I'm not sure how recent you can go while still supporting the game. The version I use is 2.03.75.

2. In order to get the game running in a window at all, make sure to set the settings in the game's file "MATH6-9.ini". Set UseDirectDraw to 0, and set DisplayFullScreen to 0.

3. When the game is run with these INI settings, you'll get 2 warning boxes. Click Continue on both of these, but do not check "Click here to keep this message from reappearing." It will screw with your settings in the future and you'll have to repeat step 2 every time you run the game.

4. I've added the DXWnd export for this game to the Resources. The settings should work fine. Don't attempt to change the window size to 640x480, as some glitch causes it to not render the whole window. I've done the math to determine the minimum size you can have the window while still having the full game screen visible, which is 820x648.