Any Apps to quickly lock screen from the top right menu bar?

Here, we set a hot corner to engage the screen saver. Basically a user drags their cursor to the bottom right corner, screen saver comes on, device now locked, etc...

thanks! I actually use this command to add lock icon in menu bar:

open /Applications/Utilities/Keychain Access.app/Contents/Resources/Keychain.menu

I run this via policy at login:

#!/bin/bash

PreferredMenuExtras=(
    "/Applications/Utilities/Keychain Access.app/Contents/Resources/Keychain.menu"
)

currentUser=$( ls -l /dev/console | awk '{print $3}' )
userHome=$( dscl . read /Users/$currentUser NFSHomeDirectory | awk '{print $NF}' )

MenuExtras=$( defaults read "$userHome/Library/Preferences/com.apple.systemuiserver.plist" menuExtras | awk -F'"' '{print $2}' )

for menuExtra in "${PreferredMenuExtras[@]}"; do
    menuShortName=$( echo "${menuExtra}" | awk -F'/' '{print $NF}' )
    if [[ $( echo "${MenuExtras}" | grep "${menuExtra}" ) ]]; then
        echo "Menu Extra "${menuShortName}" present"
    else
        echo "Menu Extra "${menuShortName}" not in plist. Opening..."
        open "${menuExtra}"
    fi
done

We use a key combination as a service to lock the screen, pushed out via policy.

thats nice @dmw3 ! But what key combination did you come up with. When i think of that, most of the combinations are already in use. Using 4 key combination is becoming too mch :S

@cindySingh The keys we use are - Control/Option/Command/Up Arrow - these are not aligned to anything that we have come across. Easy to remember and same position on all Apple keyboards.

I'be used the built in screen sleep key combo, coupled with "require password to wake from sleep"