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copied!<p>Since Windows services are run from a different context than normal user-mode applications, it's best if you don't make any assumptions about working directories or relative paths. Aside from differences in working directories, a service could run using a completely different set of permissions, etc.</p> <p>Using an <em>absolute</em> path to the file that your service needs should avoid this problem entirely. Absolute paths will be interpreted the same regardless of the working directory, so this should make the working directory of your service irrelevant. There are several ways to go about this:</p> <ol> <li><strong>Hard-code the absolute path</strong> - This is perhaps the easiest way to avoid the problem, however it's also the least flexible. This method is probably fine for basic development and testing work, but you probably want something a bit more sophisticated before other people start using your program.</li> <li><strong>Store the absolute path in an environment variable</strong> - This gives you an extra layer of flexibility since the path can now be set to any arbitrary value and changed as needed. Since a service can run as a different user with a different set of environment variables, there are still some gotchas with this approach.</li> <li><strong>Store an absolute path in the registry</strong> - This is probably the most fool-proof method. Retrieving the path from the registry will give you the same result for all user accounts, plus this is relatively easy to set up at install time.</li> </ol>

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