typedef struct _DBGKD_ANY_CONTROL_SET
{
     union
     {
          X86_DBGKD_CONTROL_SET X86ControlSet;
          ULONG AlphaControlSet;
          IA64_DBGKD_CONTROL_SET IA64ControlSet;
          AMD64_DBGKD_CONTROL_SET Amd64ControlSet;
          ARM_DBGKD_CONTROL_SET ArmControlSet;
     };
} DBGKD_ANY_CONTROL_SET, *PDBGKD_ANY_CONTROL_SET;

Windows Vista Kernel Structures