Screen.GetWorkingArea Method (Control)
Retrieves the working area for the display that contains the largest region of the specified control. The working area is the desktop area of the display, excluding taskbars, docked windows, and docked tool bars.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
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.