父窗口与子窗口之间的传值

网上搜索，很多都是说子窗口传值到父窗口，我现在为了实现webbrowser的自定义下载，前面的功夫都做到了，就差如何做个下载进度指示，之前一直不知道如何解决，后来从其他代码中忽然灵感一现.....

父窗口：Form1中按钮Button1，定时器Timer1

Public Class Form1    Dim f2 As Form2    Dim step1 As Integer = 1    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click        Timer1.Enabled = True        f2 = New Form2        f2.Show()    End Sub    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick        f2.TextBox1.Text = step1        step1 += 1        If step1 > 20 Then             f2.Close()            step1 = 1            Timer1.Enabled = False        End If    End SubEnd Class

子窗口：Form2中文本框TextBox1

 

这里 Dim f2 As Form2 而不是定义为 Dim f2 As Form ，这样就可以直接访问form2中元素。