Ahh clokr_ I need help again

I'm trying to link multiple conditions required, but cant figure out how. I'm making a calculator program and want it to set the second textbox, (which is divided by) txtNumberTwo, to one so that the program wont end.
CODE
Private Sub cmdExecute_Click()
If optAdd.Value = True Then
lblAnswer = Val(txtNumberOne) + Val(txtNumberTwo)
End If
If optSubtract.Value = True Then
lblAnswer = Val(txtNumberOne) - Val(txtNumberTwo)
End If
If optMultiply.Value = True Then
lblAnswer = Val(txtNumberOne) * Val(txtNumberTwo)
End If
If optDivide.Value = True & Val(txtNumberTwo) = 0 Then
Print "Cannot Divide by Zero."
End If
If optDivide.Value = True Then
lblAnswer = Val(txtNumberOne) / Val(txtNumberTwo)
End If
End Sub
The part seperated is the code im talking about, but using & to link them does not work. I also don't know if print is what I want to do, but I'd like a popup window to appear that says not to, or simply set optAdd.Value = True. How?