IsError function
Summary
True if expression is error value.
Syntax
IsError(expression)
The required expression argument can be any valid expression.
Example
Example
This example uses the IsError function to check if a numeric expression is an error value. The CVErr function is used to return an Error Variant from a user-defined function. Assume that UserFunction is a user-defined function procedure that returns an error value; for example, a return value assigned with the statement UserFunction = CVErr(32767), where 32767 is a user-defined number.
Dim ReturnVal, MyCheck
ReturnVal = UserFunction()
MyCheck = IsError(ReturnVal) ' Returns True.
This example uses the IsError function to check if a numeric expression is an error value. The CVErr function is used to return an Error Variant from a user-defined function. Assume that UserFunction is a user-defined function procedure that returns an error value; for example, a return value assigned with the statement UserFunction = CVErr(32767), where 32767 is a user-defined number.
Dim ReturnVal, MyCheck
ReturnVal = UserFunction()
MyCheck = IsError(ReturnVal) ' Returns True.