This topic is new for Visual Studio 2005 SP1.
Initializes the specified virtual machine control structure (VMCS) and sets its launch state to Clear.
A pointer to a 64-bit memory location that contains the physical address of the VMCS to clear.
An application can perform a VM-enter operation by using either theor function. The function can be used only with a VMCS whose launch state is Clear, and the function can be used only with a VMCS whose launch state is Launched. Consequently, use the function to set the launch state of a VMCS to Clear. Use the function for your first VM-enter operation and the function for subsequent VM-enter operations.
The __vmx_vmclear function is equivalent to the VMCLEAR machine instruction. This function supports the interaction of a host's virtual machine monitor with a guest operating system and its applications. For more information, search for the document, "Intel Virtualization Technical Specification for the IA-32 Intel Architecture," document number C97063-002, at the Intel Corporation site.