How can I get the installed directory for a C++ Windows Service?

I have a C++ Windows service, and I would like to access an executable in the same directory as the service's executable (via the system function). I'd imagine to do this I'll n开发者_运维知识库eed to find that directory, so that I can refer to the target executable's path. How can I find the directory in which the service is installed, in code?

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As others have mentioned, GetModuleFileName() can do that job but YMMV. The most reliable way is to read this information from the registry key HKLM\System\CurrentControlSet\Services\%ServiceName%\ImagePath where %ServiceName% is a name of your service.

For an example of reading the registry using C++ check this out.

Good luck!

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You can use the QueryServiceConfig() function. The path to the binary is stored in the lpBinaryPathName field of the QUERY_SERVICE_CONFIG structure.

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Depends.

If it's from within the service you can always use GetModuleFileName, which produces a fully qualified path.

If it's from another program, then since it is service you can inspect the service's registry information.

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You can use the GetModuleFileName function. See the Installing a Service example.