>other than a few command line arguments, SnagIt doesn't support automation unfortunately... it's a great product, that's the only thing missing...
>
>The only thing I found so far on this is this post
>
>http://groups.google.ca/groups?hl=en&lr=&threadm=%23SXNzQHnEHA.1800%40TK2MSFTNGP15.phx.gbl&rnum=9&prev=/groups%3Fq%3Drender%2520html%2520as%2520image%2520dotnet%26hl%3Den%26lr%3D%26sa%3DN%26tab%3Dwg
>
>... it doesn't seem to be feasible. I'll try to get in touch with those guys..

Then, what I would recommend is the automation as you said to startup up the browser and navigate to the page, then, have SnagIt install and use a keyboard simulator to simulate as if you would click on the window or a region to capture it in SnagIt.