finding the output

5 pts.
Tags:
Visual Basic 2008
what is the output to Private Sub btnDisplay_Click(...) Handles btnDisplay.Click Dim num As Double = 7 AddTwo(num) txtOutput.Text = CStr(num) End Sub Sub AddTwo(ByRef num As Double) num += 2 End Sub

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This is an old standard from VB courses. I don’t have a VB environment handy to verify, but the result should be that the “txtOutput.text” field is set to the string “9″ (assuming “txtOutput” is a text box or similar control object).

A more interesting test question arises when you change the definition of the parameter to “AddTwo” to be “ByVal” instead of “ByRef”.

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