Returns/sets the page mode, which determines which property pages are shown in the property sheet.  This parameter can be one of the following values:

• 0 — App page mode: Shows the "Events and Permissions" and the "Application Admins" pages, and selects the "Events and Permissions" page.
• 1 — Admin page mode: Shows the "Events and Permissions" and the "Application Admins" pages, and selects the "Application Admins" page.
• 2 — Group page mode: Shows the "Group IDs" and "Group Admins" pages, and selects the "Group IDs" page.
• 3 — Group Admin page mode: Shows the "Group IDs" and "Group Admins" pages, and selects the "Group Admins" page.

Returns/sets the parent window handle.