how to find guest account is enable or not

When I use registry key to get it always return error c开发者_JAVA技巧ode=5 means ,access denied

how to decide that the guest account on the system Windows 7 is enabled or disabled using C++

thanks

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Use NetUserGetInfo with level 1 and check if USER_INFO_1.usri1_flags contains the UF_ACCOUNTDISABLE bit.