This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.
Gets a value indicating whether the form can use all windows and user input events without restriction.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The property determines whether the AllWindows permission is granted. This property is set at run time in the form's constructor, and is cached for the lifetime of the form. Windows Forms applications running in partial trust cannot circumvent this check, as the common language runtime ensures that the parent constructor is always called in partial trust.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.