不知怎么声明变量
打开查看代码就是这样了。然后不知道怎么声音全局变量。例如double a,int b;不知道放哪，放哪都是错~


Partial Public Class MainPage
Inherits PhoneApplicationPage
' 构造函数
Public Sub New()
InitializeComponent()
End Sub
Private Sub btn1_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles btn1.Click
txtBox.Text = "1"
End Sub

Private Sub Button9_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles btnJia.Click
End Sub
End Class


[解决办法]
是在winphone7下开发的。