You could put code in the Item_Reply event handler to set certain controls on the reply message to be read-only. See http://www.outlookcode.com/article.aspx?ID=38 if you need information on how to work with controls in your code.

Sue Mosher, Outlook MVP
Author of Microsoft Outlook 2007 Programming:
Jumpstart for Power Users and Administrators
http://www.outlookcode.com/article.aspx?id=54

"Studer" <Studer@discussions.microsoft.com> wrote in message news:8CA4770A-5B2F-48CC-9E42-FD862CA87528@microsoft.com...
> Hello,
> I’m developing a custom Outlook 2003 form in my enterprise for requesting a
> certain service to be made. One user will request the service by filling up
> certain fields of a form and a 2nd user will receive this request a reply to
> it, filling up other fields, saying if it’s possible to be done, by what
> date, etc.
>
> The problem I have is that when the 2nd user replies, he’s able to change
> the values inserted by the firs user, and I don’t what that to happen. How
> can I prevent this from happening?
>
> I’m using a message. I’ve tried with a task, but the problem remains.
> Thank you for your help.
>
> Studer
>
11 JunCustom Form - read-only fields.Studer
11 Jun\ Re: Custom Form - read-only fields.Sue Mosher [MVP-Outlook]
11 Jun   \ Re: Custom Form - read-only fields.Studer
11 Jun      \ Re: Custom Form - read-only fields.Sue Mosher [MVP-Outlook]
12 Jun         \ Re: Custom Form - read-only fields.Studer
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