Search engine - domain extension specific

[MobileDesigner]

Does anyone have a clue on how to make a basic search engine using google and a specific domain extension?

I hope to use googles search engine (they provide for webmasters) so that I may search only the .net extensions.
If there is one for Wordpress, where would i find it? i cant find anything like this anywhere.

 

[katherine]

Like this ?

site:*.net <your query here>

 

[MobileDesigner]

yes, like that. but i want to put it inside of a google search engine (widget) that will rest on my website.

one can place the shortcode that you mentioned above into google search box, but im looking for the code that users wont see (they will only see a search box on my website).

 

[katherine]

Will you be writing that widget ? perhaps you'll want a visible text box for the query and a hidden field that will contain the exact query passed to google including the "site" part.