How to open and read the contents of a VHDX file

Use the OpenVirtualDisk function:

http://msdn.microsoft.com/en-us/library/windows/desktop/dd323680(v=vs.85).aspx[^]

With VIRTUAL_STORAGE_TYPE parameter: VIRTUAL_STORAGE_TYPE_DEVICE_VHDX

http://msdn.microsoft.com/en-us/library/windows/desktop/dd323704(v=vs.85).aspx[^]

Example is here:

http://code.msdn.microsoft.com/windowshardware/CppVhdAPI-4412d182[^]