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New Message on BDOTNET

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From: Senthil-Maverick
Message 1 in Discussion

hi  i have a stored Procedure to retrun an Out put parameter.   The Qry is like this : 
  Select  @VarCallCount =  (sql1)   IF @VarCallCount<>null
   Set @CAllCOUNT = @VarCallCount
  Else 
   Set @CAllCOUNT =0
  
  Select @var = ( sql2)
  If @var <>null
   Set @CHATCOUNT = (@CAllCOUNT + @var  )
  Else 
   Set @CHATCOUNT = (@CAllCOUNT  )  
  Select  @varFInal = (sql3)
  
  IF @varFinal <>null
   Set  @FINALCOUNT =(@CHATCOUNT  + @varFinal) 
  Else 
   Set  @FINALCOUNT = (@CHATCOUNT )
  
  Set @out= @FINALCOUNT
  
  Return @out
 i have declared all the variables and for the simplicity i have sql1, sql2 and sql3 . 
  Now   my Problem is when i use  (using NULL STRING )  IF @VarCallCount<>''
   Set @CAllCOUNT = @VarCallCount
  Else 
   Set @CAllCOUNT =0 I am not able to get the OutPut value.   But when i use     IF 
@VarCallCount<>null
   Set @CAllCOUNT = @VarCallCount
  Else 
   Set @CAllCOUNT =0 
i am able to get The out put value when i use null and not nullstring '' . 
why is this so ?? 
,,,,, 
Senthil 
  
  


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