User-1567482218 posted
To overlay text over an image and create a new image from it, adapt these code samples -
http://mvark.blogspot.com/2004/12/code-programmatically-add-text-to.html
http://blogs.msdn.com/jrule/archive/2004/08/16/215393.aspx
TO position an image or text over another image in a web page, check this - http://mvark.blogspot.com/2006/08/how-to-position-image-or-text-over.html