This article explains how you can use VB.Net to open a KML File.
Note: The google earth API will only be available if you have Google Earth installed on your computer.
The first step would be to add reference to the Google Earth 1.0 Type Library. Note the version might be different on your computer:
The code below can be used to open a KML File:
Dim appGoogleEarth As EARTHLib.ApplicationGE
appGoogleEarth = New EARTHLib.ApplicationGE
Call appGoogleEarth.OpenKmlFile( _
"D:StuffBusinessTempUntitled Placemark.kml", 1)
Note: The reason for using the sleep function, is to allow Google Earth to load. If Google Earth has not finished loading and we attempt to open the KML file an error will occur.
You can download the file and code used in this article from the link below: