fill javascript textboxes using webform

Question

I am trying to write a winforms application that will automatically fill in textboxes on webpages.  The problem is that the textboxes are part of a javascript function that is on a separate, unavailable website.  Is there any way to create a winform application with two corresponding textboxes and a button that when clicked will automatically navigate to the webpage and fill-in the boxes in the js function?  I can get the button to navigate to the webpage using .NET's webbrowser control, but I can't progress farther than that.
Thanks

Sam Hobbs · Answer

That sounds like what my article describes; the only difference is that you would be putting data into the web page instead of taking data from the web page, but please don't ignore it just because you think it won't work.

Suthish Nair · Answer

If its a simple .html file then might be possible..

Kevin Voss · Answer

That's not what I'm trying to do.  I have a webpage that has empty textboxes on them that I want to populate from textboxes on an app that I'm developing.  The user would input data into the application textboxes, click a button that would navigate to the correct website (also input by the user, but I have this part working), and the application would populate the textboxes on the webpage with the data that they input on the application.

Sam Hobbs · Answer

I don't understand what you mean by "fill-in the boxes in the js function" but I suspect that you don't need to to that. If the data is visible in the web page then you can probably "scrape" it from there using something such as in Introduction to Web Site Scraping .