mac how full screen in a virtual machine

Question Ha, my mac installed in virtualbox, the want full screen, but the mac virtual machine only 1024 * 768 resolution, enhanced installation package can not be installed, is there no one realized the full screen? How to achieve it? Thank ha ~
Reply:
No way, vmware also like
Reply:

To control GOP, use the following VBoxManage command:
VBoxManage setextradata "VM name" VBoxInternal2/EfiGopMode N
Where N can be one of 0,1,2,3,4 referring to the 640x480, 800x600, 1024x768, 1280x1024, 1440x900 screen resolution respectively.

To the point of it, ha ha!

Reply:
I supplement it, to understand that the second floor, said:
1 In com program, cd to virtualbox installation directory, then run the VBoxManage setextradata "You want to set the resolution of the virtual machine name" VBoxInternal2/EfiGopMode N
The value of N can be 0,1,2,3,4, corresponding to 640x480, 800x600, 1024x768, 1280x1024, 1440x900
Reply:
Above wrong, is cmd
Reply:
Then add this: I remember first off the virtual machine