How do I delete InfoPath Recently used forms from registry?

[Daniel]

HI
I hava a problems during programming.
First , below steps is for deleting Recently used forms from InfoPath,
a. click Start, all programs, microsoft office, microsoft office Infopath
b. Select one of the form in the Fill Out a Form window that is displayed.
c. Under Form Tasks on the right had side of the window, select Remove this
Form.

But I was asked to finish this task in registry instead of doing above steps.
So can your tell me how to do that.

Best wishes