How to create a masking region within a family?

[duy.phamT7SSP]

I've attempted to research the FilledRegion and FilledRegionType classes, but I'm unable to create a Masking Region element within the family.

I hope someone can assist me. Thank you.

duyphamT7SSP_1-1702564076418.png

[michael-coffey]

I don't believe it was possible before 2024.  In 2024, they added FilledRegion.CreateMaskingRegion Method.  It has 2 overloads, one for a view specific and another for a sketch plane.  For earlier versions, you would need to make a regular filled region with invisible lines and use a filled region type that's solid white.

[duy.phamT7SSP]

@michael-coffey 

Thank you for your support.

However, I am using Revit 2022, and the family template does not support creating filled regions. Only masking regions are supported, as shown in the attached image at the beginning of the post.