试图了解如何将值从函数传递回子对象并在消息框中显示结果，但我无法理解。我在下面缺少什么学习代码:-
Sub mySend()
Dim myNum As Integer
myNum = InputBox("Enter number")
myReturn (myNum)
msgbox myReturn 'would like to display result in messagebox here but no joy
End Sub
'--------------------------------------
Function myReturn(ByRef myNum As Integer)
Dim myCalc As Integer
myCalc = myNum + 10
myReturn = myCalc
End Function
最佳答案
不要使用ByRef参数-只需正确使用函数即可。
Sub mySend()
Dim myNum As Integer
myNum = InputBox("Enter number")
myNum = myReturn(myNum) '// You need to assign (=) the value to the variable
msgbox myNum
End Sub
'--------------------------------------
Function myReturn(number As Integer) As Integer '// Note the return type after the ()
Dim myCalc As Integer
myCalc = number + 10
myReturn = myCalc
End Function
如果要在示例中通过引用传递变量，则需要实际更改该变量的值，否则当您在调用代码中再次引用该变量时，该值将保持不变:
(这是对您的代码进行了修改，以正确使用时显示ByRef的结果，我不建议您实际使用此代码)
Sub mySend()
Dim myNum As Integer
myNum = InputBox("Enter number")
myReturn myNum '// No need for parentheses here
msgbox myNum
End Sub
'--------------------------------------
Function myReturn(ByRef myNum As Integer)
myNum = myNum + 10
End Function