Permission/Deny Mask in SharePoint

Question

Hi All,

I have a question regarding SharePoint permission masks. In SharePoint it is possible to set the grant/deny rights using masks. Details are given the following article.

http://msdn.microsoft.com/en-us/library/dd304243(PROT.13).aspx

My question is when we have a permission/deny mask.

For example if you deny “ViewItem” permission using the central-admin, you will get 4611686844973976575 as the deny mask. This permission masks is computed by aping | to several individual permission masks.

So is it possible to extract individual permission masks which are used to calculate permission mask such as 4611686844973976575?

Thanks.