A .NET application uses the methods in the PropertyContext interface to get and set the properties of objects.
If an application sets the value of a property, the new value replaces any previous value the property had.
For further information about XMS properties, see Properties of XMS objects.
For ease of use, in .NET XMS property names and values are predefined as public constants in a class called XMSC. The names of these constants are in the form XMSC.USERID. Alternatively, you can use the XMS property names used in C or C++, which are in the form "XMSC_USERID". In this case, the property name must be provided as a string.