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Asked: 2026-05-12T16:57:25+00:00

The LogonUser function http://msdn.microsoft.com/en-us/library/aa378184(VS.85).aspx returns a handle that you can use to impersonate the

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The LogonUser function http://msdn.microsoft.com/en-us/library/aa378184(VS.85).aspx returns a handle that you can use to impersonate the user, when you are done using it you call CloseHandle to close it. My question is, do you need to close the handle if the logon attempt fails (ie wrong username or password)?

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  1. Editorial Team

    No. LogonUser returns zero if it fails and no handle is created. Though, if you do call CloseHandle on it, CloseHandle should just return ERROR_INVALID_HANDLE.

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