How to get the context item in Workflow activity (SharePoint)

Question

I am writing custom activity for sharepoint workflow and I don\'t know how I can use current workflow item, SPWeb or SPSite.

I see http://blogs.microsoft.co.il/blogs/dav

Answer 1

Kit Menke's answer is very comprehensive and covers just about all you need: I would only add the following...

If you do this:

SPWeb tmpweb = __Context.Web;
SPSite site = new SPSite(tmpweb.Url);
SPWeb web = site.OpenWeb();

instead of this:

SPWeb web = __Context.Web;
...

then you are free of the security context passed through to the workflow by the person who triggered it.