今天想做windows上的自动化，所以才有了模拟鼠标点击的需求，先考虑用powershell实现：
首先先安装一个名为“WASP”免费可用的Powershell扩展程序，下载地址：http://wasp.codeplex.com/
下载解压之后放到C:\Windows\System32\WindowsPowerShell\v1.0\Modules\下，如图：
之后，在开始->运行处输入powershell，以管理员方式运行，
执行Import-Module WASP,则引入了扩展程序，
假如有个已打开的cmd窗口，且名称也为cmd，在其中输入字符123，则执行以下命令：
Select-Window cmd | Send-Keys 123
具体细节可参考：
英文：http://powershell.com/cs/blogs/tips/archive/2014/05/06/automation-via-keystroke-and-mouse-click.aspx
中文：http://www.pstips.net/automation-via-keystroke-and-mouse-click.html
有时使用Select-Window焦点移动到了窗口上，但是send-key时，输入不进去东西，也就意味着输入焦点没有在新窗口上，此时这种失效，考虑用vbs先点击一下要输入的那个窗口，使得输入焦点在新窗口上，之后再执行send-keys操作。
用vbs模拟鼠标点击的操作代码如下：
mouseckick.vbs文件内容如下：
Option Explicit
Dim WshShell
Dim oExcel, oBook, oModule
Dim strRegKey, strCode, x, y
Set oExcel = CreateObject("Excel.Application") '创建 Excel 对象
set WshShell = CreateObject("wscript.Shell")
strRegKey = "HKEY_CURRENT_USER\Software\Microsoft\Office\$\Excel\Security\AccessVBOM"
strRegKey = Replace(strRegKey, "$", oExcel.Version)
WshShell.RegWrite strRegKey, 1, "REG_DWORD"
Set oBook = oExcel.Workbooks.Add '添加工作簿
Set oModule = obook.VBProject.VBComponents.Add(1) '添加模块
strCode = _
"'Author: Demon" & vbCrLf & _
"'Website: http://demon.tw" & vbCrLf & _
"'Date: 2011/5/10" & vbCrLf & _
"Private Type POINTAPI : X As Long : Y As Long : End Type" & vbCrLf & _
"Private Declare Function SetCursorPos Lib ""user32"" (ByVal x As Long, ByVal y As Long) As Long" & vbCrLf & _
"Private Declare Function GetCursorPos Lib ""user32"" (lpPoint As POINTAPI) As Long" & vbCrLf & _
"Private Declare Sub mouse_event Lib ""user32"" Alias ""mouse_event"" (ByVal dwFlags As Long, ByVal dx As Long, ByVal dy As Long, ByVal cButtons As Long, ByVal dwExtraInfo As Long)" & vbCrLf & _
"Public Function GetXCursorPos() As Long" & vbCrLf & _
"Dim pt As POINTAPI : GetCursorPos pt : GetXCursorPos = pt.X" & vbCrLf & _
"End Function" & vbCrLf & _
"Public Function GetYCursorPos() As Long" & vbCrLf & _
"Dim pt As POINTAPI: GetCursorPos pt : GetYCursorPos = pt.Y" & vbCrLf & _
"End Function"
oModule.CodeModule.AddFromString strCode '在模块中添加 VBA 代码
'Author: Demon
'Website: http://demon.tw
'Date: 2011/5/10
'x = oExcel.Run("GetXCursorPos") '获取鼠标 X 坐标
'y = oExcel.Run("GetYCursorPos") '获取鼠标 Y 坐标
'WScript.Echo x, y '以对话框的形式打印出当前鼠标的坐标
oExcel.Run "SetCursorPos", 200, 300 '设置鼠标要点击的X Y 坐标
Const MOUSEEVENTF_MOVE = &H1
Const MOUSEEVENTF_LEFTDOWN = &H2
Const MOUSEEVENTF_LEFTUP = &H4
Const MOUSEEVENTF_RIGHTDOWN = &H8
Const MOUSEEVENTF_RIGHTUP = &H10
Const MOUSEEVENTF_MIDDLEDOWN = &H20
Const MOUSEEVENTF_MIDDLEUP = &H40
Const MOUSEEVENTF_ABSOLUTE = &H8000
'模拟鼠标左键单击
oExcel.Run "mouse_event", MOUSEEVENTF_LEFTDOWN + MOUSEEVENTF_LEFTUP, 0, 0, 0, 0
'模拟鼠标左键双击（即快速的两次单击）
'oExcel.Run "mouse_event", MOUSEEVENTF_LEFTDOWN + MOUSEEVENTF_LEFTUP, 0, 0, 0, 0
'oExcel.Run "mouse_event", MOUSEEVENTF_LEFTDOWN + MOUSEEVENTF_LEFTUP, 0, 0, 0, 0
'模拟鼠标右键单击
'oExcel.Run "mouse_event", MOUSEEVENTF_RIGHTDOWN + MOUSEEVENTF_RIGHTUP, 0, 0, 200, 200
'模拟鼠标中键单击
'oExcel.Run "mouse_event", MOUSEEVENTF_MIDDLEDOWN + MOUSEEVENTF_MIDDLEUP, 0, 0, 0, 0
'关闭 Excel
oExcel.DisplayAlerts = False
oBook.Close
oExcel.Quit
以上代码实现的是鼠标左键单击电脑屏幕的（200,300）坐标处。
参考博客：http://demon.tw/programming/vbs-control-mouse.html