Program's Problem "How to Locate the position on the map"

[jacky_beginner]

Dear All,
I'm doing a project about the map. I would like to ask how (say methods and tools)to locate positions on the map ( the map can be jpg, bmp, etc). Thank you very much!

[Yves M]

[ moved post to more appropriate forum ]

[Yves M]

Can you describe your problem a bit more clearly please? What is "map" and what is "a position"?

[jacky_beginner]

Thank you very much!
For example I have a map in jpg or bmp formate. When I click on it then it can show a red cross in where I just clicked!

[Yves M]

Well, you should load the map into a memory HDC, paint it on the screen and then capture WM_LBUTTONDOWN and paint the red cross with MoveToEx and LineTo. If you are programming in C++ that is. It's probably a good idea to check some example source code on the main Codeguru site to learn how to load and display a JPG or a BMP.

[jacky_beginner]

Thank You.
How about if I want to develop it in the pocket PC use VS.Net as a development tool, how can I work with that? Moreover, how can I locate the position I have just clicked? Could you kindly give me a detail explaination? Thank you very much!