vb.net发送键盘信息 vb中的键盘事件

VB.net 怎么制作按键连发功能

用API函数，以下代码Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As LongPrivate Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As LongPrivate Const WS_EX_LAYERED = H80000

Private Const GWL_EXSTYLE = (-20)

Private Const LWA_ALPHA = H2

Private Const LWA_COLORKEY = H1Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long

Private Const HWND_TOPMosT = -1

Private Const SWP_NOMOVE = H2

Private Const SWP_NosIZE = H1

Private Declare Function GetForegroundWindow Lib "user32" () As Long

Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long

Const WM_KEYDOWN = H100

Const WM_KEYUP = H101

Const WM_CHAR = H102

Const VK_F1 = H70

Private Sub SendF1(hwnd) '调用这个过程即可对目标窗体发送F1键

Call PostMessage(hwnd, WM_KEYDOWN, VK_F1, 0)

Call PostMessage(hwnd, WM_KEYUP, VK_F1, 0)

End Sub这里是发送F1的实例，各个按键对应的虚拟键码，要到网上查

vb.net中使用sendkeys无效?

vb.net中使用sendkeys无效，是因为窗口没有处于活动状态。

VB6的SendKeys有时有些问题，比如打开任务管理器，以下代码可以：

Sub main()

Dim WshShell As Object

Set WshShell = CreateObject("WScript.Shell")

WshShell.SendKeys "^+{ESC}"

End Sub

以下代码却不可以：

Sub main()

SendKeys "^+{ESC}"

End Sub

所以最好使用WScript.Shell中的SendKeys。

vb.net 如何吧字符穿转换成键盘码

（1）在Form1上布置一个Label，用来显示键盘码

（2）窗体代码如下

Imports System.Windows.Forms

Imports System.IO

Imports System.Net

Imports System.Windows.Forms

Imports System.IO

Imports System.Net

Public Class Form1

    Private Sub Form1_Load(sender As Object,

                           e As EventArgs) Handles MyBase.Load

        KeyPreview = True

    End Sub

    Private Sub Form1_KeyDown(sender As Object,

                              e As KeyEventArgs) Handles MyBase.KeyDown

        Label1.Text = e.KeyValue

    End Sub

End Class

按键盘上的键，Label1将显示对应键的键盘码

请问VB.NET 如何利用PostMessage 向窗口的指定Edit发送信息

你不用程序的情况能不能用TAB切换焦点。如果这样不行的话你用程序控件是没用的。

或都直接对第二个编辑框发送消息。

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