Page 318 - Open Soource Technologies 304.indd

Event Driven Programming

11: Add code to handle the C and CE buttons. C clears all input to the calculator, whereas CE
only clears the number currently being entered.
Private Sub btnC_Click()
sLeft = “”
sRight = “”

sOperator = “”
tbResult.Text = “0”
bLeft = True
End Sub

Private Sub btnCE_Click()
If bLeft Then
sLeft = “”
Else
sRight = “”
End If

tbResult.Text = “0”
End Sub
12:

Fig. 14.11: Completed calculator in action (ALLD)

If buttons and textbox are not named the same as the code expects, it will need
to change the names to match buttons and textbox, or change buttons and
textbox to match this code.

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