LayoutsPageBase.RightsCheckModes Enumeration
Specifies the event or events at which the rights of the user are checked.
This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.
Namespace: Microsoft.SharePoint.WebControlsAssembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: No
This enumeration is primarily used as the value of the LayoutsPageBase.RightsCheckMode property.
This is a bitwise enumeration so you can specify that rights be checked at both OnLoadComplete and OnPreInit.