Sharepoint custom form required field
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I want to create a custom form based off of an original new/edit form. I want the custom form to have fields that the new/edit forms do not, but is is possible to have the fields on the custom form be required while I don't want them to show up or be required in the new/edit forms? I tried using the ASP validation properties in Sharepoint designer, but I kept getting errors.

Any help is appreciated.

Thanks!