2.2.3.10.3 OS_TYPE Enumeration

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The OS_TYPE enumeration specifies information about the operating system (OS) type for use with Server Handle Key Values (section 2.2.3.10).<171>

 typedef  enum 
 {
   VER_NT_WORKSTATION = 0x00000001,
   VER_NT_DOMAIN_CONTROLLER = 0x00000002,
   VER_NT_SERVER = 0x00000003
 } OS_TYPE;

VER_NT_WORKSTATION:  The OS is a Windows NT operating system workstation.

VER_NT_DOMAIN_CONTROLLER:  The OS is a Windows NT domain controller.

VER_NT_SERVER:  The OS is a Windows NT server. A server that is also a domain controller is reported as VER_NT_DOMAIN_CONTROLLER, not VER_NT_SERVER.