Possibly. There's various hard-coded elements within each window. Giving them certain names will give them certain functions, even in custom windows. I refer to it as "pushed data". Think of the server delivering a package to a specific person, and no one else can have it. "Your eyes only" type of deal.
WC_Title recieves the window title.
Buttons named WC_Close, WC_Help, and WC_Options get hard-coded Press functions.
Page objects WC_Frame, WC_Titlebar, and WC_Background (And whatever the new context is) respond to the Window Options settings.