Are you familiar with AutoIt? It's a scripting language with control over windows and controls. You could possibly write your entire program in AutoIt, or simply write the necessary scraping bits and call them from your VBScript.

I haven't used it in over 5 years, so I can't say for sure it has what you need, but take a look: http://www.autoitscript.com/site/autoit/

I last used it to control three different GUI applications, each with multiple windows and controls like buttons, sliders, drop-down boxes and text fields.