How to use Alt+Ctrl+Del when you are using Remote Desktop in Windows?

I was accessing remotely my computer by using mstsc (Remote Desktop) feature from Microsoft Windows. At one point I was not able to control my PC and I was forced to do an "Alt+Ctrl+Del". If you use typical "Alt+Ctrl+Del", then you will get the lock screen of the computer you are using now. For getting the lock screen of the computer which is accesed remotely you could simply use "Alt+Ctrl+End". This works for the remote computer !!!