This is a good error :-)
Actually is not an error, but a way to signal the success of the Win32 API function call.
Here is the definition from the WinError.h header file:
// MessageId: ERROR_SUCCESS
// The operation completed successfully.
#define ERROR_SUCCESS 0L
#define NO_ERROR 0L // dderror
#define SEC_E_OK ((HRESULT)0x00000000L)
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