Form item value.
Set the propert when the item is created:
Writing the value:
oFormItem.Value = true;
Reading the value:
value = oFormItem.Value;
Property access for read and write
This property is also functional for Web Panels. It is not functional in InternetExplorer8 and lower.
If the oExtra.onChange
entry is set when the window is being opened and if the user changes this value in the configurator then the user method with attribute oSystem.ChangeType = "value"