C# Signature:

[DllImport("advapi32.dll", SetLastError=true)]
static extern bool GetTokenInformation(
    IntPtr TokenHandle,
    TOKEN_INFORMATION_CLASS TokenInformationClass,
    IntPtr TokenInformation,
    uint TokenInformationLength,
    out uint ReturnLength);

User-Defined Types:

TOKEN_INFORMATION_CLASS

Notes:

Call once with zero for the third and fourth parameters to obtain the required size, then allocate the buffer and call again supplying these parameters.

Tips & Tricks:

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Sample Code:

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Alternative Managed API:

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