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假如Form1有个TextBox1，双击TextBox1填入123
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Public Class Form1
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Integer, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub TextBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.DoubleClick
System.Windows.Forms.SendKeys.Send("123")
End Sub
End Class
看你的VB.NET 版本了
用 My.Computer.Keyboard.SendKeys("123", True) 代替 System.Windows.Forms.SendKeys.Send("123") 也可以
原码：
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub TextBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.DoubleClick
My.Computer.Keyboard.SendKeys("123", True)
End Sub
End Class
方法一：
Clipboard.SetText "123321"
Shell "notepad.exe /c "
方法二：
a = Shell("notepad.exe", vbNormalFocus)
AppActivate a
SendKeys "123321", True
让网页自动填写表单操作步骤：
打开浏览器设置，点击打开【Internet选项】
在Internet选项卡上选择【内容】，点击自动完成下面的【设置】
在自动完成设置中勾选希望自动完成功能用于哪些方面，勾选前面的复选框即可
点击确定完成
Private Sub SendBlogTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SendBlogTimer.Tick
Dim textboxUserId As HtmlElement
Dim textboxPassword As HtmlElement
Dim buttonSubmit As HtmlElement
textboxUserId = SendBlogBrowser.Document.All("username")'获取用户名输入框
textboxPassword = SendBlogBrowser.Document.All("password")'获取密码输入框
buttonSubmit = SendBlogBrowser.Document.All("btnLogin")'获取登陆按钮
textboxUserId.SetAttribute("value","用户名")'给用户名输入框赋值
textboxPassword.SetAttribute("value","密码"）'给密码框赋值
buttonSubmit.InvokeMember("click")’执行登陆按钮的单击
End Sub
其中的SendBlogBrowser为WebBrowser控件
Public Sub AutoComplete(ByVal cmb As ComboBox, ByVal e As System.Windows.Forms.KeyPressEventArgs)
If cmb.DataSource Is Nothing Then
Return
End If
If e.KeyChar = Microsoft.VisualBasic.ChrW(Keys.Enter) Then
Return
End If
Dim strFindStr As String = ""
If e.KeyChar = Microsoft.VisualBasic.ChrW(Keys.Back) Then
If (cmb.SelectionStart = cmb.Text.Length) Then
If cmb.Text.Length 0 Then
strFindStr = cmb.Text.Substring(0, cmb.Text.Length - 1)
End If
Else
If cmb.SelectionStart 0 Then
strFindStr = cmb.Text.Substring(0, cmb.SelectionStart - 1)
End If
End If
e.Handled = False
Else
If (cmb.SelectionLength = 0) Then
strFindStr = cmb.Text + e.KeyChar
Else
If (cmb.SelectionStart = cmb.Text.Length) Then
strFindStr = e.KeyChar
Else
If cmb.SelectionStart 0 Then
strFindStr = cmb.Text.Substring(0, cmb.SelectionStart - 1) + e.KeyChar
Else
strFindStr = e.KeyChar
End If
End If
End If
End If
Dim intIdx As Integer = -1
Dim dv As DataView
If TypeOf (cmb.DataSource) Is DataTable Then
dv = CType(cmb.DataSource, DataTable).DefaultView
If strFindStr "" Then
dv.RowFilter = cmb.DisplayMember " Like '%" strFindStr "%'"
Else
dv.RowFilter = ""
End If
cmb.DataSource = dv
cmb.SelectedIndex = -1
cmb.Text = strFindStr
Else
dv = CType(cmb.DataSource, DataView)
If strFindStr "" Then
dv.RowFilter = cmb.DisplayMember " Like '%" strFindStr "%'"
Else
dv.RowFilter = ""
End If
cmb.DataSource = dv
cmb.SelectedIndex = -1
cmb.Text = strFindStr
End If
cmb.SelectionStart = strFindStr.Length
e.Handled = True
End Sub
Private Sub comboBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles comboBox1.KeyPress
AutoComplete(sender, e)
End Sub