VirtualBox設定螢幕解析度(Display Resolution)

command:
VBoxManage controlvm "Guest" setvideomodehint "1024" "768" "24"

"Guest" - 虛擬機器的名稱(name of virtual machine)
"1024","768" - 螢幕顯示的解析度(desired diplay resolution)
"24" - 顏色 (8,16,24) (desired display color depth)