How can we set Permission to the custom outlook form using VBA?

[Vijay Kumar.G]

Hi,
I have a outlook form which will be filled partially by a person1, person1
forwards to person2 , person2 fills the custom form partially and goes
on............

i was able to set the Permission for "Do Not forward" which is working fine
, the code i implemented as below

'Code start
Item.Permission = 1 ' 1 value is for "olDoNotForward"
Item.PermissionService = 1 '1 constant value is for "olWindows"
'Code End

I want to set the permission as "Microsoft Confidential" for this Outlook
form
using VBA code. I want this to happen through code .
what is the constant value for "Microsoft Confidential"?

Thank you