VB模拟按键

Question

在我的程序中，我想模拟按下MediaPlayPause 键。就像一个注释，我不想检查键是按下还是按下，我想通过我的程序按下键。

我尝试过 SendKeys.Send 但特殊键仅限于{Enter} 和{Tab} 等。

Answer 1

好的，我从这个答案中移植了 c# 代码：https://stackoverflow.com/a/7182076/2000557

我不了解 VB.Net，但使用本指南复制过来并不难：http://msdn.microsoft.com/en-us/library/172wfck9.aspx

无论如何，我在表单上放置了一个带有点击事件的按钮。

Imports System.Runtime.InteropServices

Public Class Form1

    'this constant represents the hex value for the key to send to user32.dll
    Const APPCOMMAND_MEDIA_PLAY_PAUSE = &HE0000
    'this constant represents which command. Sort of like the function in user32.dll we are calling.
    Const WM_APPCOMMAND = &H319

    'this declares the user32.dll call to SendMessageW we are making
    Declare Auto Function SendMessageW Lib "user32.dll" Alias "SendMessageW" (
    ByVal hWnd As Integer,
    ByVal Msg As Integer,
    ByVal wParam As Integer,
    ByVal lParam As Integer) As Integer

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        'call the SendMessage function with the current window handle, the command we want to use, same handle, and the button we want to press
        SendMessageW(Handle, WM_APPCOMMAND, Handle, APPCOMMAND_MEDIA_PLAY_PAUSE)
    End Sub
End Class

我通过打开 WMplayer 对其进行了测试，按钮播放/暂停了我拥有的音乐。如果您需要任何其他帮助，请告诉我。如果你想实现其他键，这里有一个参考：http://msdn.microsoft.com/en-us/library/windows/desktop/ms646275(v=vs.85).aspx