press Enter key automatically after 30 seconds

Hi all,
I have a vb application in which the user is prompted to enter issue in Input Box. What i want to do is that if the user doesnot enters the issue within 30 seconds that automatically enter key should be pressed (i.e OK button of Input Box should be pressed). I know i have to use timer control but how it should be used i dont know. If someone can provide me sample code then i would be really grateful.
Please help me out. Its very urgent.
Any help will be appreciated.
Thanx in advance.

You can't do this.
The input box, when activated takes the focus away from the form your timer would run on.
So, as long as the input box is showing, the timer on the form won't execute.

Thanx for ur reply
As i was not able to do this. i used one form and gave it look and feel of input box and i am using that form istead of input box