WP_Widget class with file upload.

Hi all,

i want to know ,how to add a uploading field in the widget control , using widget class.
While using the class, i tried using the type=”file” with all proper get_id’s function, but how will i get the info of the file uploaded in the update function??

can any one help me with a small code that may help me create a widget with an upload field in control form.