最近刚开始学VB.NET
我的操作系统winXP sp2

我先在模块里声明FindWindow函数
Module Module1


    Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

End Module



我建了一个窗体，窗体中加入一个Button按钮，然后在Button1_Click加入代码
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim GameHwnd As Long
        GameHwnd = FindWindow(vbNullString, "我的电脑")
        If GameHwnd = 0 Then
            MsgBox("Error:Can Not Find window!")
            Exit Sub
        Else
            MsgBox(GameHwnd)
        End If

    End Sub

不管我打没打开“我的电脑”这个窗口，点击Button按钮时GameHwnd都不会返回0，并且每次返回的数都不一样，这是为什么啊？？