Determines if the user can directly edit the value by typing into the edit portion of the control. When this property is false, the value may still be changed by selecting days from the dropdown, or using arrow keys.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, 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