$inet->GetStatusCallback(context)
Returns information about the progress of the asynchronous operation identified
by context; this information consists of two values: a status code (one of
the INTERNET_STATUS_* constants) and an additional value depending on the status code.
For example, if the status code returned is INTERNET_STATUS_HANDLE_CREATED, the
second value will hold the handle just created. For more information on these
values, please refer to the Microsoft Win32 Internet Functions documentation.