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Old January 5th, 2005, 11:50 AM
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Default What is Meant by Instancing in Class Modules


I have got a question regarding DLL and EXE.

While creating a DLL or EXE , we use Instancing property. What does it mean. What and where we have to use each instances.

If i get some illustrative examples, it will be better.


Ramkumar A D
Old February 2nd, 2005, 12:09 AM
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An activeX has 4 instencing property

Private : means that other applications arent allowed access to type library information about the class, and cannot create instances of it. Private objects are only for use within your component.

PublicNotCreatable : means that other applications can use objects of this class only if your component creates the objects first. Other applications cannot use the CreateObject function or the New operator to create objects from the class.

MultiUse : allows other applications to create objects from the class. One instance of your component can provide any number of objects created in this fashion.
An out-of-process component can supply multiple objects to multiple clients; an in-process component can supply multiple objects to the client and to any other components in its process.

GlobalMultiUse : is like MultiUse, with one addition: properties and methods of the class can be invoked as if they were simply global functions. Its not necessary to explicitly create an instance of the class first, because one will automatically be created.

Amit Jain
Sr. Software Engineer

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