Hi,
Yes mappoint can exacly what you wants. To use in Delphi 2..7 you have to use the object model, and starting from D2005 you can use the component. I use i twith success in D5 and D7.
Mappoint comes with an API with all the methods you need. Examples are given in the help file in VB, but that should be no problem to read
And for any other problems there is this exelent forum