| Returns the index of a variable according to the variable's name. The VarIndex function can be used in other Var functions as the variable index. | 
| Syntax: | VarIndex(variable name) | 
| Parameters: | variable name: A string representing a variable's name. | 
| Returns: | The index of a requested variable. | 
| Example: | VarAttr(VarIndex('Customer ID')) returns the attribute of the variable named 'Customer ID'. | 
| Note: | If the variable name is not found, this function returns Zero.When the given variable name exists more than once, the function relates to the lowest variable in the task tree.
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| See also: | The Online and Rich Client Samples projects (program VA06 and RVA06) |