- Download DxWnd and unpack the folder. 7zip can unpack 
.rarfiles - Open dxwnd.exe
 - Go to 
Edit > Addand browse to the game executable - Select 
Run in WindowandFullscreento run the game in borderless windowed - Under Position make the following changes:
X: 0,Y: 0,W: 1920,H: 1080(for HD Resolution)- Select Desktop
 
 - On the Video tab, for Screen Resolution ensure 'Native' is selected
 - Press OK to exit
 - Go to 
File > Saveand confirm - Double click the game in DxWnd to test the game
 - You should be able to alt-tab while in the game now
 
- You can import game settings instead of adding a game manually. You do this by clicking 
File > Importand navigating to theexportsfolder in DxWnd - If you enable Expert Mode, you can access logs to see where an issue might be occuring
 - It's important to check that 'Native' video is enabled, especially for DX9 games