EXCEL EXPERT
                
                   92 Points
                   Joined March 2007
                
               
			  
			  
             
            
              Hi Naveen
I have seen that Mr. Khaleel has answered your query in a very simple way.
Nevertheless I also worked on your problem and i also have devised a small VBA.
It is a bit complicated  but still u can have a look at it also.
U will have to copy the entire macro in the Sheet module (Not n the Work book macro )
The macro uses the property of "Change" in the sheet . As soon there is any change in Sheet data , it will execute itself . Effectively meaning every time u press ENTER or Update anything in the sheet , The Macro will run.  
The macro will work as follows :
If u type anything in Cell A1 , it will hide the rows and columns as specified in macro Hide_Row_ Col .
If u delete the contents from A1 or the contents of A1 is blank it will unhide the cells by using macro unhide_Row_Col.
The macro is : 
 
Public Cell_Change, current_cell
 
 
Sub Worksheet_Change(ByVal Target As Range)
    
    Dim rg As Range
  
  current_cell = ActiveCell.Address
    Set rg = Intersect(Cells(1, 1), Target)
    
    
    If rg Is Nothing Then
    UnHideRow_column      ' Check if there is any data in cells A1
    Else
        If Cells(1, 1).Value = "" Then   ' Check if the Cell  A1 is blank
        UnHideRow_column
        Else
        hide_row_Col
            
        End If
    End If
End Sub
 
Sub UnHideRow_column()
    If Cells(1, 1).Value = "" Then
    Rows("6:8").Select  ' These rows will hide , you can change these as u like 
    Selection.EntireRow.Hidden = False
    Columns("C:D").Select   '  These col will hide  u can change 
    Range("C5").Activate
    Selection.EntireColumn.Hidden = False
    Range(current_cell).Activate
    Range(current_cell).Select  '  This will take u back to the cell where u where                                                                    'working  
      
    End If
    Exit Sub
End Sub
 
Sub hide_row_Col()
        
        Rows("6:8").Select
        Selection.EntireRow.Hidden = True
        Columns("C:D").Select
        Range("C5").Activate
        Selection.EntireColumn.Hidden = True
Range(current_cell).Select
 
End Sub
 
 
Mr. Khaleel please help me in reducing the number of If Statement in this macro  
 
Regards
 
Abhishek