Filling webform by using windows app data

I am not sure what you are asking. My article Introduction to Web Site Scraping however will probably help. It mainly describes how to get data from a web page but it should provide the basics needed to know how to also put data into a web page.

Thanx for reply Senthil,

Can you please check auto form fill software ....It will work like that. 
ACTUALLY THIS APPLICATION WILL DEVELOP[ BY USING DDE(DYNAMIC DATA EXCHANGER)...BUT I DID NOT KNOW HOW TO USE IN C#.NET

Hi,

I do not think they provide such facilities to pass the login crendtials of gmail through the url from the external site.

But they are giving API or you can use their SMTP and POP details to send the mail.