Wide screen resolution in VirtualBox

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http://askubuntu.com – I've installed Windows 7 in VirtualBox hosted by Ubutnu. After the instalation in Windows 7 I can't see the resolution I need (wide screen). I have only the 4:3 (1024x768 etc.) How can I fix this? Do I need to install the drivers for my laptop as usual? How to force it to detect my laptop screen type? (HowTos)