Hi,
You can use the resource files to get the static text converted into the destination language.
Where as the data that user key into the any controls (like textbox etc) will be a dynamic data that needs to be converted as well, you can use the google translator to do the same.
Refer the following article.
http://www.codeproject.com/KB/cs/translateresx.aspx?msg=3681305#xx3681305xx[
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I have recently added a post to the same to get the translated text value. you can download the code from the above post and then just modify the code as per my answer.
Hope this will answer your question