The SECURITY_IMPERSONATION_LEVEL enumeration type contains values that specify security impersonation levels. Security impersonation levels govern the degree to which a server process can act on behalf of a client process.

C# Signature:

enum SECURITY_IMPERSONATION_LEVEL
{
     SecurityAnonymous,
     SecurityIdentification,
     SecurityImpersonation,
     SecurityDelegation
}

VB Signature:

User-Defined Types:

Enum SECURITY_IMPERSONATION_LEVEL
    SecurityAnonymous
    SecurityIdentification
    SecurityImpersonation
    SecurityDelegation
End Enum

Notes:

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SECURITY_IMPERSONATION_LEVEL on MSDN

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