Determine if Service Already Installed

Determine if a Windows service is already installed.

Note:This software is available as a pre-release.

Download Chilkat Ruby Library

require 'chilkat'

service = Chilkat::CkService.new()

service.put_ServiceName("MyService")

#  returns -1 for failure (inability to check)
#  returns 1 if already installed.
#  returns 0 if not yet installed.

retval = service.IsInstalled()
if (retval < 0)
    print "Failed to query service control manager" + "\n"
else
    if (retval == 1)
        print "Service is already installed" + "\n"
    else
        print "Service is not installed" + "\n"
    end

end