How to Get the Instance Level Public IP Address fro my VM?

Hello Everyone!!!

I have a Virtual Machine on Azure and a cloud Service hosted on that VM, I am trying to set the Instance Level Public IP through Powershell .

Get-AzureVM-ServiceNameFTPService-NameFTPInstance`
| Set-AzurePublicIP -PublicIPName ftpip2 `|Update-AzureVM

But Powershell throws warning and Exception.

Please Tell Me If there is another way to do it