OK, getting closer! Thanks Hannah! Got the code to compile by deleting the label I created, following instructions more closely (to copy the group ‘type’ from the properties page, since it changed between versions), and fixed another error (typo, had an extra period).
Now, when I click the button (I closed Cust Maint and re-opened it first), I get an ‘Object reference not set to an instance of an object’ error (related to ‘Method: lblGoogleEarth_LinkClicked’).
I figure I should first hard code a URL in there to first test it. How?

These seem like the relevant parts, so I changed Jose’s email example from “EmailAddress” or (“mailto:” + target ) to a URL string here:
private void lblGoogleEarth_LinkClicked(object Sender, LinkLabelLinkClickedEventArgs e)
{
String target = e.Link.LinkData.ToString();
System.Diagnostics.Process.Start("https://earth.google.com/web/search/1395+John+Fitch+Boulevard,+South+Windsor,+CT");
}
And here:
if(lblGoogleEarth.Links.Count>0)
lblGoogleEarth.Links[0].LinkData= view.dataView[view.Row]["https://earth.google.com/web/search/1395+John+Fitch+Boulevard,+South+Windsor,+CT,+USA"].ToString();
else
lblGoogleEarth.Links.Add(0,lblGoogleEarth.Text.Length,view.dataView[view.Row]["https://earth.google.com/web/search/1395+John+Fitch+Boulevard,+South+Windsor,+CT,+USA"].ToString());
Application Error
Exception caught in: App.CustomerEntry.CustomerEntryForm.EP.ESAPCO.Customization.CustomerEntry_ALL_CBS.CustomCode.8
Error Detail
============
Message: Object reference not set to an instance of an object.
Program: App.CustomerEntry.CustomerEntryForm.EP.ESAPCO.Customization.CustomerEntry_ALL_CBS.CustomCode.8.dll
Method: lblGoogleEarth_LinkClicked
Client Stack Trace
==================
at Script.lblGoogleEarth_LinkClicked(Object Sender, LinkLabelLinkClickedEventArgs e)
at System.Windows.Forms.LinkLabel.OnLinkClicked(LinkLabelLinkClickedEventArgs e)
at System.Windows.Forms.LinkLabel.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Label.WndProc(Message& m)
at System.Windows.Forms.LinkLabel.WndProc(Message& msg)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)