若窗体中已有一个名为Command1的命令按钮、一个名为Label1的标签和一个名为Text1的文本框,且文本框的内容为空,然后编写如下事件代码:Private Function f(x As Long) As BooleanIf x Mod 2=0 Thenf=TrueElsef=False EndIfEnd FunctionPrivate Sub Commandl_Click()Dim n As Longn=Val(Me!text1)p=If(f(n),"Even number","Odd number")Me!Label1.Caption=n& "is"&pEndSub窗体打开运行后,在文本框中输入21,单击命令按钮,则标签显示内容为【 】。