This function is useful/needed to detect if an application is still running in any logged Windows user.

For example, Inno Setup depends on it for [Setup]: AppMutex. This directive is used to prevent the user from installing new versions of an application while the application is still running, and to prevent the user from uninstalling a running application.

CreateMutex function: https://msdn.microsoft.com/en-us/library/ms682411.aspx

Syntax

HANDLE WINAPI CreateMutex(
  _In_opt_ LPSECURITY_ATTRIBUTES lpMutexAttributes,
  _In_     BOOL                  bInitialOwner,
  _In_opt_ LPCTSTR               lpName
);

Related:

• Example code: https://stackoverflow.com/a/44793025

Similar function already in JNA:

• CreateEvent: https://github.com/java-native-access/jna/blob/master/contrib/platform/src/com/sun/jna/platform/win32/Kernel32.java#L932
• CreateEvent function: https://msdn.microsoft.com/en-us/library/ms682396(v=vs.85).aspx