What wilfred said about the altitude makes sense, I just put 100 in as an example.

trinity as I understand it your saying you dont want to use GetLocation because you already have the lat/lon but I think your missing the purpose of GetLocation.

Getlocation isn't used to return a set of coordinates but to return a location object on a set of coordinates that you pass it, as my code shows. As you already know the coordinates your working with you can put this in the GetLocation method to return a location object, once you have the location object you can place a pushpin or do whatever else it is that you need to do.

Perhaps i'm misunderstanding your question but this seems the logical answer to me.