hi replyazim
you can use diskpart
Start up an Administrator Console and run DISKPART. Execute the lines after DISKPART> below, changing them for your own system.
C:\Users\Scott\Desktop>diskpart
Microsoft DiskPart version 6.1.7601
Copyright (C) 1999-2008 Microsoft Corporation.
On computer: HEXPOWER7
DISKPART> create vdisk file=d:\VMs\Win8.vhd type=expandable maximum=60000
100 percent completed
DiskPart successfully created the virtual disk file.
DISKPART> select vdisk file=d:\VMs\Win8.vhd
DiskPart successfully selected the virtual disk file.
DISKPART> attach vdisk
100 percent completed
DiskPart successfully attached the virtual disk file.
DISKPART> create partition primary
DiskPart succeeded in creating the specified partition.
finish you vhd file is create