How resolution can be increased in a hyper-v virtual machine of windows 8

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http://serverfault.com – i already have Windows 8 from MSDNAA. I'm very interested in Hyper-V, so i've created an hyper-v virtual machine with openSUSE. If i connect, i have only a 800x600 resolution. I have not found any resolution settings. If you ever be able to change it? best regards, (HowTos)