VirtualBox VDI, VHD, VMDK virtual hard disk formats convert each other

Windows7 Boot program can boot the VHD format of the virtual hard disk, and VirtualBox created by the virtual hard disk file is in VDI format, how to do?
it used to be done with other software, but VirtualBox had already quietly brought us a VBoxManager.exe to convert the format.
The command is as follows (Windows environment, Linux version should also have vboxmanager this binary file):
The Vboxmanager exists in the VirtualBox installation directory.
VMDK converted to VDI
VBoxManage.exe Clonehd source.vmdk target.vdi--format VDI
VDI converted into VMDK
VBoxManage.exe Clonehd source.vdi target.vmdk--format vmdk
VDI converted to VHD
VBoxManage.exe Clonehd source.vdi target.vhd--format VHD
vmdk to Vhd,vhd to VDI, vmdk a little bit to change the parameters is OK.
Note that the original file is not deleted after you run the command.

VirtualBox VDI, VHD, VMDK virtual hard disk formats convert each other