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Old July 30th, 2003, 07:24 AM
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Default ActiveX Exe and Dll

I want to know the details of the following

1)What is ActiveX Dll and ActiveX Exe
2)ActiveX Exe and Dll,
3)Advantage of ActiveX Dll over Active Exe,
4)Difference Types of Instancing Property in ActiveX Dll and Exe
5)types of ActiveX Components in VB?



Your information is very helpful for us.

Thank & regards
Vasudevan


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Old September 26th, 2003, 08:48 AM
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An ActiveX Dll runs is an in process server running in the same memory space as the client process.

An ActiveX Exe is an out of process server which runs in it's own separate memory space.

Question 2 is the same as question 1.

Advantages of ActiveX Dll
-------------------------
1) An in-process component shares its clientís address space, so property and method calls donít have to be marshaled. This results in much faster performance.

Disadvantages of ActiveX Dll
----------------------------
1) If an unhandled error occurs it will cause the client process to stop operating.

Advantages of ActiveX Exe
-------------------------
1) The component can run as a standalone desktop application, like Microsoft Excel or Microsoft Word, in addition to providing objects.
2) The component can process requests on an independent thread of execution, notifying the client of task completion using events or asynchronous call-backs. This frees the client to respond to the user.
3)If an error occurs the client processes can continue to operate.

Disadvantages of ActiveX Exe
----------------------------
1) Generally slower than an ActiveX dll alternative.

For instancing see:

http://msdn.microsoft.com/library/de...entclasses.asp

For project types see:

http://msdn.microsoft.com/library/de...ectoptions.asp


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