troubleshooting Question

Issue with ShellExecuteEx when run from a Service

Avatar of Sachin_registered_786
Sachin_registered_786 asked on
InstallationWindows Vista
8 Comments1 Solution4724 ViewsLast Modified:
I am facing issue in executing an msi package on Windows Vista using ShellExecuteEx from a Service.

As per what I understand, Executing anything that requires elevation using CreateProcess/CreateProcessAsUser will result in Error 740. The solution to this is use ShellExecute(Ex). ShellExecute makes sure that the elevation prompt occurs (if needed).

Now, Here is what I want to do.
I want to execute an msi which requires elevation. The command I am trying to execute through ShellExecuteEx is "c:\windows\sytem32\msiexec.exe /i c:\temp\Flash.msi -q". (I am specifying "runas" in lpverb member of SHELLEXECUTEINFO). This is executed by my service named "MyService". I know that on Vista a service cannot display UI. But this msi is capable of running in quiet mode. I verified this by executing the above command from cmd prompt. It worked fine.

Please let me know What is the problem in executing msi from the service.


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