Sorry, I don't know. I've never seen that happen. Are you using VDos32 or DOSBox as DOS emulation? Can you not bring the Glidos window to the top by clicking the mouse over it?

Sorry, I wrote it wrong. I mean that everything is fine, I can play the game but when I press "alt-tab" the other windows shows under the game window. So, the main window is always on top. I don't use neither Vdos nor DOSBox only default setting.

I'm guessing you have Glidos set to use OpenGL. What I see on Windows 7 is the task bar appears, but still all other windows are hidden by Glidos. I think that's just the way OpenGL works. I don't know how to change it.

It's no better when setting Glidos to DirectX: although the main window does disappear on alt-tab, when it reapears it stays a blank grey. I know why that is, but fixing it is very hard.