Hi
you just need to apply this on the FamilyDocument not the ProjectDocument,
you can retrieve the family document from the project document easily by selecting the family instance then access the family symbol then access the family prop from the family symbol then get the family document from it,
next step is to get all the family extrusions just as the lookup addin dose!
you can get the extrusions using the element category filter on the family document
now you have the family extrusions and you can retrieve whatever you want from them!
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Re: GetVisibility method
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