使用 vb.net 响应第三方应用程序表单事件

Question

我想知道我应该如何编写我的 VB.net 应用程序以响应第三方应用程序中的表单加载事件（也是用 VB.net 编写的）

为了测试，我创建了两个基本程序，一个有两个表单（程序 A），一个（程序 B）尝试监听程序 A 的适当表单加载事件。我曾尝试使用 WithEvents，但在程序的第二个表单加载时它不会被触发。

这是程序 A 的代码：

Public Class StartPage
  Public WithEvents loadtimer As New System.Windows.Forms.Timer

  Private Sub StartPage_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    loadtimer.Interval = 1000
    loadtimer.Enabled = True
    loadtimer.Start()
  End Sub

  Private Sub loadtimer_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles loadtimer.Tick
    loadtimer.Stop()
    SystemStatus.Show()
  End Sub

End Class


Public Class SystemStatus
  Inherits StartPage

  Private Sub StartPage_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
      Me.Label1.Text = "This is the form that I want to listen for the load event"
      Me.loadtimer.Enabled = False
  End Sub
End Class

这是程序 B 的代码：

Imports Program_A

Public Class ListeningForm
  Dim WithEvents testlisten As New Program_A.SystemStatus

  Private Sub testlisten_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles testlisten.Load
    Label1.Text = "SystemStatus form loaded"
  End Sub

  Private Sub ListeningForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Label1.Text = "Waiting for SystemStatus load event..."
  End Sub
End Class

在编程方面我还是个新手，所以也许这甚至不可能，或者我只是没有理解我一直在阅读的内容。无论如何，请告知我下一步应该采取的行动。

非常感谢，
理论

Answer 1

这将满足您的要求。

Imports Program_A

Public Class ListeningForm
 Dim WithEvents testlisten As New SystemStatus

 Private Sub testlisten_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles testlisten.Load
  ' now this event will fire
  Label1.Text = "SystemStatus form loaded"
 End Sub

 Private Sub ListeningForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
  Label1.Text = "Waiting for SystemStatus load event..."
  ' the load event will not fire until you call this
  testlisten.Show() 
 End Sub
End Class