windows services - installation / deinstallation toggle script

Tried to find a script that installs a windows service if it is not installed and is capable to deinstall it if needed. Finally, I created myself the following:

sc query SERVICENAMEif %errorlevel% equ 0 (                echo uninstall                goto uninstall) else (                echo install                goto install)

Check if it is installed: if so uninstall, if not install. 

in :install call:

• sc create SERVICENAME binpath=%cd%\Service.exe displayname="the service" start=demand 
• if you need to set credentials for the startup then set: obj and password
• %cd% is the current directory
• sc start SERVICENAME

in :uninstall call:

• sc stop SERVICENAME
• sc delete SERVICENAME
• delete can already be called even if the service is still in "stopping" state so in a script it works the right way even with some timing issues