.net随笔-vb2015打开外部程序发送键盘信号(1)

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim notepadID As Integer
        ' 下面可**一个运行中的程序
        'AppActivate("无标题 - 记事本")
        ' 通过shell函数运行一个新实例
        notepadID = Shell("NOTEPAD.EXE", AppWinStyle.NormalFocus)
        AppActivate(notepadID)
        My.Computer.Keyboard.SendKeys("您好，世界！", True)
    End Sub
End Class

C#
public void SendKeys (string keys, bool wait);
Parameters
keys
String
A String that defines the keys to send.
wait
Boolean
Optional. A Boolean that specifies whether or not to wait for keystrokes to get processed before the application continues. True by default.
Exceptions
SecurityException
A partial-trust situation exists in which the user lacks necessary permissions

因为没有托管方法来**另一个应用程序，所以您可以在当前应用程序中使用该类，手动选择要向其发送**的窗口，或者使用Windows API方法(如FindWindow和SetForegroundWindow)强制将焦点移动到其他应用程序上