Borderless Windowed Mode

The Winslow

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Warning: It seems that this extension is broken with all versions of GM past 1.4.1499. Roll back to v1.4.1499 if you experience problems where the game window increases/decreases in size until it crashes.

Adds Borderless Windowed mode to Gamemaker! Well, adds it back!

This is for Windows only (as of now, only tested on Windows 7 but it should work with Windows 8, let me know if you have problems). I have received a report that it doesn't work with xp, so I will have to look into a solution for that.


  • dll written in c++
  • Commented code describing how to implement it fully (and any problems and their potential solutions/workarounds).


  • bwindow_init removes the border from the window.
  • bwindow_reset adds the border back.
  • bwindow_in_front places the window in front of other windows/the taskbar.
  • bwindow_not_front allows other windows to be above the game window.

End User Licence Agreement (EULA).

Age Rating: 4+


GMS1 - Version 1.0.0. Published January 15, 2015

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