FILE: VB5DCOM.EXE: Using Callbacks and WithEvents with DCOM

ID: Q175510

The information in this article applies to:

Microsoft Visual Basic for Windows Learning, Professional, and Enterprise Editions, version 6.0
Microsoft Visual Basic Control Creation, Learning, Professional, and Enterprise Editions for Windows, version 5.0 on the following platforms: NT, Windows 95, Windows 98

SUMMARY

VB5DCOM.EXE is a Visual Basic sample application that demonstrates how to use WithEvents and CallBacks remotely via DCOM.

MORE INFORMATION

It also addresses all of the security settings that are required to make DCOM function correctly with Visual Basic using DCOM Config. It even demonstrates how to check a client machines registry to confirm that DCOM is installed on WIN95 platforms and enabled on WINNT platforms and WIN98. If DCOM is not present on the WIN95 machine, then it presents the user with the opportunity to immediately download the necessary DCOM files from the Microsoft Web site.

The following file is available for download from the Microsoft Software Library:

 ~ Vb5dcom.exe (size: 44756 bytes) 
               - 44KB Self-extracting zipfile, readme.txt

For more information about downloading files from the Microsoft Software Library, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q119591
   TITLE     : How to Obtain Microsoft Support Files from Online Services

MORE INFORMATION

Place the file Vb5dcom.exe in a root directory of a drive that has at least 150KB of available space. This a self-extracting executable so it will create the proper folders for you and place all the files in their respective locations. Execute the file Vb5dcom.exe. You will now have a DCOMDemo folder with separate Client and Server folders.

Open the server project \DCOMDemo\Server\DCOMDemoServer.vbp. In the project's properties, make sure that the "remote server files" option on the component tab is checked and make an executable of the server. The server will now be registered on your machine and you will have a .vbr file containing the registry entries for the server. Close the server project.

Open the client project \DCOMDemo\Client\DCOMDemoClient.vbp. Set a reference to the DCOMDemoServer in the projects references. Run the project locally to check for problems before distributing to other machines for testing remotely.

See the included file \DCOMDemo\Permissions.txt if you encounter problems (such as Error 70 - Permission denied).

REFERENCES

For more information about distributing DCOM applications, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q161837
   TITLE     : HOWTO: Create a DCOM Client/Server Application

Additional query words: Permissions kbVBp500 kbVBp kbWinOS98 kbDSupport kbVBp600 kbdse kbDCOM Keywords :

Last Reviewed: April 28, 1999