Blogs module is based on Generic Content module, therefore you will be able to use Generic Content module API to work with the blog posts.
The blogs API documentation can be found here:
Since every blog post is actually an object of IContent type, you can use ContentManager class to work with it. More about ContentManager, IContent interface and Generic Content API you can find here:
To get the content of the blog post, you can use Content property of the IContent interface (remember blog posts are of IContent type). It would look something like this:
string blogPostContent = blogPost.Content;
I hope this helps. Let us know if there is anything else we can do for you.
the Telerik team
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