Help Creating Form

[DavidW]

I want to create a form that captures the following information but am not
sure how to achieve it.

Capture a hyperlink -
1. A text box to hold this value
2. A button that launches an Open Folder type dialog. The value selected in
the dialog to automatically update the text box in step 1.

Add a Reminder Flag -
1. A user to specify a Complete By date
2. The Complete By date to be used to automatically create a reminder flag
3. Validate that the Complete By date is equal to or greater than today

I have used a normal Message form as a template but please let me know if
there is a better template to use.

Thanks