Error Handling in Dialup Network

I know that How to Run Dialup Network
by using Shell
Shell("rundll32.exe rnaui.dll,RnaDial " _
    & strConnectionName, 1)

But I want to Know the following
1) How could i handle Error in case of any problem(No DialTone, Network Error etc) during dialing ?
2) How Can i check whether dialup was connected or not ?

Thank U
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Visual Basic Classic

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