Yes, you can implement the interface EPiServer.PlugIn.ICustomPlugInLoader and then do like this

// Hide/show tab
        public PlugInDescriptor[] List()
        {
            PlugInDescriptor[] descriptors = null;

            // Check if we should show the plugin
            if (CurrentPage.PageTypeID == Utils.Settings.PageTypePressRelease || CurrentPage.PageTypeID == Utils.Settings.PageTypeFinancialReport)
            {
                descriptors = new PlugInDescriptor[1];
                descriptors[0] = PlugInDescriptor.Load(this.GetType());
            }
            // else return null
            return descriptors;
        }

Magic, huh? :)

It is magic, but where so I implement this?

Hi!

As Erik mentioned, implement the ICustomPlugInLoader interface for your tab-plugin to be able to decide if you want to create a plug-in or not for the current page. See the following example from the forms posting plug-in:

    [GuiPlugIn(DisplayName = "XFormdata",
                Description = "Show xformdata",
                Area = PlugInArea.EditPanel,
                UrlFromUi = "edit/XFormPostings.ascx",
                LanguagePath = "/edit/formpostings",
                RequiredAccess = AccessLevel.Edit)]
    public partial class XFormPostings : UserControlBase, ICustomPlugInLoader

...

...

        public PlugInDescriptor[] List()
        {
            if (!PageContainsFormProperties())
            {
                return new PlugInDescriptor[] { };
            }
            else
            {
                return new PlugInDescriptor[] { PlugInDescriptor.Load(typeof(XFormPostings)) };
            }
        }

Linus Ekström

Thanks perfect! It works like magic!