Link is used to link one CICS program to another which is 
at a level belwo the called program. In other words , one 
higher leveel program calling another lower level program, 
but doesnot expect the command to be returned to the called 
program.
We have to use return in that case.

Hi Sushree,

You have made some mistake to write above answer.
correct answer is that,:-

Link is the used to link different CICS programs to each 
other, in which one Higher level program gives the Control 
to the other Lower level program and expected CONTROL to be 
returned back to called program.

Hopes you got the mistake done from you.

yes link send the control to other application program at 
lower logical level.
and the control is expected back to the main program...

using XCTL only control not expected back by the main 
program..
but in LINK the control is expected back to the main program