Text-labels in FSX

The program FSDiscover from Flight1 provides FSX with small textlabels over different POI (Points Of Interest). These points (= locations) is created via the program and saved in a simple textfile where each line has the name of location, latitude and longitude.I would like to create a program which makes FSX show text-labels from a list of small towns in my danish scenery.I guess I have to explore the FSX SDK and maybee the SimConnect part of it. But I do not know much about this and wonder if somebody could give me a hint about where to look??/Lars :)