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 Lets you use the results of one expression inside another expression. 
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 Syntax: 
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 ExpCalc (expression specification) 
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 Parameters: 
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 expression specification – the expression number to execute represented by the EXP literal, such as '2'EXP as a pointer to the second function in the expression list of the current task. 
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 Returns: 
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 The evaluation value of the specified expression. 
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 Examples: 
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ExpCalc('2'EXP) executes expression #2. 
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If expression number 4 contains “A>B and G>10 or F” and you need to use the same expression but with ‘NOT’ added to it, you can enter it as follows: NOT (ExpCalc('4'EXP))   
  
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 Note: 
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 The expression specification may be one of the following: 
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 See also: 
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 How Do I Reuse Expressions Within Another Expression? 
The Online and Rich Client Samples projects (program EX01 and REX01) 
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