Recently, VMware quietly released version 1.0 of its Virtual Disk Development Kit, a collection of C libraries, code samples, utilities, and documentation to help you create or access VMware virtual disk storage.
The release notes tell us this enables a wide range of solutions, including:
The new API supports managing two kinds of disks; Managed Disks (local virtual diskfiles) and Hosted Disk (virtual disk files on you ESX/VMFS systems). This means the API will allow you to access disks remotely and opens a low of new opportunities for companies making virus scanning software, backup, forensic, etc.
To obtain the software, navigate to the VMware Developer Center and under the heading SDKs and APIs, click Virtual Disk. For download you will need to provide your email address and registered password.
The relevant VMware Community can be found here.