Step 1 : Build - > Publish Web Site
Step 2 : Publish it in the IIS server's folder : C:\inetpub\wwwroot
Step 3: Open IIS
Step 4: Expand the Root Node of the IIS in the left panel. In the Sites node you will get you published site
Step 5 : Right click on the your site and Choose Convert to Application:
Step 6: Now it will be converted to application Now Right click on it and choose Browse :
Done!
If you want to create a installer for your web application then you will need to create a web setup project .
This feature is not available in the Visual Web Developer Express version. But there is a open source tool available on CODEPLEX
This feature is not available in the Visual Web Developer Express version. But there is a open source tool available on CODEPLEX
Check following link for more detail