'Declaration Protected Overridable Function ValidateFocusSite( _ ByVal focusSite As Object, _ ByRef errorMessage As Exception _ ) As Boolean
protected virtual bool ValidateFocusSite( object focusSite, out Exception errorMessage )
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2