Hi Mahaveer ,
The INDIRECT function will work if the worksheet and cell references are separated from the other symbols.
For example , the complete address consists of the following components :
1. The single quote symbol '
2. The complete sheet name , including the path and file name F:data[EMPLOYEE7.xlsx]EMPLOYEE7
3. The single quote symbol '
4. The exclamation mark !
5. The complete range address $A$2:$C$31
Only (2) and (5) above can be in cells ; the others have to be specified directly. If you have (2) in C1 , and (5) in D1 , then the following will work :
=VLOOKUP(A1,INDIRECT("'"&C1&"'!"&D1),2,FALSE)
Of course , this will work only when the file EMPLOYEE.xlsx is open ; when it is closed , you will get a #REF! error.
Narayan