Returns last error that occured.

A Long value.  

object.LastError

The LastError Property syntax has these parts:

When working in scripting environments, such as ASP or PowerBuilder, you are unable to retrieve information about possible error that was returned by previous executed method, you can use LastError property to read error that occurred.

To get string representation of the error, you can use code like this:

Debug.Print Telnet1.ErrorText(Telnet1.LastError)