VixDiskLib_GetMetadataKeys() retrieves all existing keys from the metadata of a virtual disk, but not the key values. Use this in conjunction with VixDiskLib_ReadMetadata().

vixError = VixDiskLib_GetMetadataKeys(disk.Handle(), &buf[0], requiredLen, NULL);

Here is an example of a simple metadata table. Uuid is the universally unique identifier for the virtual disk.

adapterType = buslogic
geometry.sectors = 32
geometry.heads = 64
geometry.cylinders = 100
uuid = 60 00 C2 93 7b a0 3a 03-9f 22 56 c5 29 93 b7 27