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Windows Genuine Advantage API Functions

[The Windows Genuine Advantage API Functions are no longer available for use as of Windows 7.]

The Windows Genuine Advantage (WGA) API provides the following functions.

The WGA functions are available only on Windows Vista and Windows XP installations that have been validated by clicking Validate Windows on https://www.microsoft.com/genuine.

Function Description
GetLastErrors
Retrieves the trace output of the most recent validation session.
IsAlreadyGenuine
Specifies whether the copy of Windows running on the current system is genuine.
LegitCheck
Returns a value that indicates whether the copy of Windows running on the current system is genuine.
SetPartnerID
Sets the value of the partner ID used for reporting WGA status.