Hyperlink Not Working

I have a form with a Command button. i have a text box also which is
bound to my
Button. i have created a standard module and created an onclick event
for my button
which is something like this ( if a user clicks on the button it will
give an option
to user to add a file. The Path of that file will be copied to the
textbox which is associated
to my control or button.) i changed the data type also for my textbox
to
Hyperlink so then
when a user clicks on that path which is in the textbox it will
automatically open that document. Well for
some reason it is not working. any
help or suggestions will be really appreciated.
Thanks