Hey!
Thanks for your answer!
My objective is to make the VM as invisible as possible, while running an application in it, which is not compatible with Windows 7 and has to run in a virtualized WinXP guest system.
At the moment I am almost done, there are only two things left annoying me:
1. The VM is being started through a desktop shortcut with target
> "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" startvm WindowsXP-VM <
where "WindowsXP-VM" is the name of my VM.
The problem about this one is that this makes the VM start in window, even if I choose "minimized" in the shortcut properties.
After the OS has bootet and Windows desktop appears, the VM automatically switches over to seamless mode, just like I want it.
Now the Application starts via AutoStart, the User works with it, and when he is done, he wants to shut down the VM just by clicking the [X] in VirtualBox's seamless mode control bar.
2. The shutdown dialog appears, asking for the way to shut down.
The problem about both of the above is that the User doesn't have any IT/computer knowledge, but needs this application to work with.
So, if you have any ideas how to fix the two points above, please tell me.
Thanks for answering that quick, and have a nice afternoon! - Flix3793
(Oh, and sorry for my [maybe] bad english - german IT-guy typing here

)