[
   uuid(51C82175-844E-4750-B0D8-EC255555BC06),
   version(1.0),
]
interface KMSServer
{
    int RequestActivation
	(
		[in] int requestSize, 
		[in, size_is(requestSize)] unsigned char* request, 
		[out] int* responseSize, 
		[out, size_is( , *responseSize)] unsigned char** response
	);
}