Using the SDK for dummies

Hello,

I am currently using the SDK and working my way to the c++ sample project.

There is a simple application I want to make:

-Load S57 data
-replace the standard symbols with the S52 once (using the methode discussed here http://forum.globalmapperforum.com/discussion/comment/8104/#Comment_8104)
-Project the data correcly
-export a picture

Could you give me a few pointers on what to look at and which SDK functions I should use.
Help of any kind would be much appiciated.