Horace papa's life

Installing  VirtualBox Guest Addition in host and target platform still can't chanage window XP resolution, the highest resolution is 1024X768.

Two methods to adjust display resolution.

1.Set vesa resolutions in host platform:

cd c:\programfiles\oracle\virtualbox  
VBoxManage setextradata "VM name" "CustomVideoMode1" "1400x1050x16

2.Configuring the maximum resolution of guests when using the graphical frontend:

VBoxManage setextradata global GUI/MaxGuestResolution any

will remove all limits on guest resolutions.

VBoxManage setextradata global GUI/MaxGuestResolution >width,height<

manually specifies a maximum resolution.

VBoxManage setextradata global GUI/MaxGuestResolution auto

restores the default settings. Note that these settings apply globally to all guest systems, not just to a single machine.

reference from

https://www.virtualbox.org/manual/ch09.html#idm8266