Adds a post to a given blog. Accepts a ContentData class as the post content. Return new post ID. 

This method can be accessed through the blog.asmx file located in:

~/Workarea/webservices/WebServiceAPI/Content/Blog.asmx

[SoapHeader("AuthHeader")]
[SoapHeader("RequestInfoHeader")]
[WebMethod(MessageName = "AddPost", Description = "")]
public long AddPost(long blogID, ContentData PostContent, string[] Categories, bool Pingback, string Tags, string TrackbackURL);

<SoapHeader("AuthHeader")>
<SoapHeader("RequestInfoHeader")>
<WebMethod(MessageName = "AddPost", Description = "")>
Public Function AddPost(blogID As long, PostContent As ContentData, Categories As string[], Pingback As bool, Tags As string, TrackbackURL As string) As long