Calling 32-bit COM components through a. NET program in Windows Server 2008 X64

When developing the SMS interface, you need to invoke a COM component that is successful on the native test. However, the following error occurred on the server deployed to the Windows Server 2008 X64:

Retrieving the COM class factory for component with CLSID {79AD7B73-C515-40B4-8B02-CB0F5FA5A1A} failed due to the Followin G error:80070005

At deployment, the COM component is registered directly on the command line through Regsvr32.

After a few hours of this problem, I finally found the reason and the solution.

The server is using a 64-bit system, and the. NET program is compiled at the local level, and the target is selected as any CPU. NET programs run in 64-bit environments on the server.

It is found in the relevant data that 32-bit COM components cannot be accessed in a 64bit environment.

So just let. NET program to run in 32-bit way, you can solve the problem.

Workaround:

1, through the C:\WINDOWS\SYSWOW64\REGSVR32 registration components.

2. In Visual Studio, set the target platform for the compilation (Platform target) to: X86, and then recalculate the items.