如何找到应用程序中可用的所有控件。是否可以将应用程序与应用程序交互。我需要将我的应用程序的值设置为在我的系统中以特定控件运行的另一个应用程序（Windows）。
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2 回答
1
此代码将获取与系统中运行的进程相关的所有控制值。在此代码中有 2 个文件 1.ApiWindow 是一个类文件，另一个是 main() 类。Main() 将使用 ApiWindow 类并在 Spy++ 工具工作时获取控件值。我们可以处理控件并可以使用 SendMessage(child.hWnd, WM_SETTEXT, 0, "Ur Value") 为特定控件设置值。这个 hwnd 将获取句柄 id，WM_SETTEXT 将传递一条消息以更新给定的文本。将 WM_SETTEXT 声明为全局变量，如 Const WM_SETTEXT = &HC 。
注意：运行程序时让 Visual Studia “以管理员身份运行”
代码 ：
Imports System.Collections.Generic
Imports System.Runtime.InteropServices
Imports System.Text
Public Class ApiWindow
Public MainWindowTitle As String = ""
Public ClassName As String = ""
Public hWnd As Int32
End Class
''' <summary>
''' Enumerate top-level and child windows
''' </summary>
''' <example>
''' Dim enumerator As New WindowsEnumerator()
''' For Each top As ApiWindow in enumerator.GetTopLevelWindows()
''' Console.WriteLine(top.MainWindowTitle)
''' For Each child As ApiWindow child in enumerator.GetChildWindows(top.hWnd)
''' Console.WriteLine(" " + child.MainWindowTitle)
''' Next child
''' Next top
''' </example>
Public Class WindowsEnumerator
Private Delegate Function EnumCallBackDelegate(ByVal hwnd As Integer, ByVal lParam As Integer) As Integer
' Top-level windows.
Private Declare Function EnumWindows Lib "user32" _
(ByVal lpEnumFunc As EnumCallBackDelegate, ByVal lParam As Integer) As Integer
' Child windows.
Private Declare Function EnumChildWindows Lib "user32" _
(ByVal hWndParent As Integer, ByVal lpEnumFunc As EnumCallBackDelegate, ByVal lParam As Integer) As Integer
' Get the window class.
Private Declare Function GetClassName _
Lib "user32" Alias "GetClassNameA" _
(ByVal hwnd As Integer, ByVal lpClassName As StringBuilder, ByVal nMaxCount As Integer) As Integer
' Test if the window is visible--only get visible ones.
Private Declare Function IsWindowVisible Lib "user32" _
(ByVal hwnd As Integer) As Integer
' Test if the window's parent--only get the one's without parents.
Private Declare Function GetParent Lib "user32" _
(ByVal hwnd As Integer) As Integer
' Get window text length signature.
Private Declare Function SendMessage _
Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As Int32) As Int32
' Get window text signature.
Private Declare Function SendMessage _
Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As StringBuilder) As Int32
Private _listChildren As New List(Of ApiWindow)
Private _listTopLevel As New List(Of ApiWindow)
Private _topLevelClass As String = ""
Private _childClass As String = ""
''' <summary>
''' Get all top-level window information
''' </summary>
''' <returns>List of window information objects</returns>
Public Overloads Function GetTopLevelWindows() As List(Of ApiWindow)
EnumWindows(AddressOf EnumWindowProc, &H0)
Return _listTopLevel
End Function
Public Overloads Function GetTopLevelWindows(ByVal className As String) As List(Of ApiWindow)
_topLevelClass = className
Return Me.GetTopLevelWindows()
End Function
''' <summary>
''' Get all child windows for the specific windows handle (hwnd).
''' </summary>
''' <returns>List of child windows for parent window</returns>
Public Overloads Function GetChildWindows(ByVal hwnd As Int32) As List(Of ApiWindow)
' Clear the window list.
_listChildren = New List(Of ApiWindow)
' Start the enumeration process.
EnumChildWindows(hwnd, AddressOf EnumChildWindowProc, &H0)
' Return the children list when the process is completed.
Return _listChildren
End Function
Public Overloads Function GetChildWindows(ByVal hwnd As Int32, ByVal childClass As String) As List(Of ApiWindow)
' Set the search
_childClass = childClass
Return Me.GetChildWindows(hwnd)
End Function
''' <summary>
''' Callback function that does the work of enumerating top-level windows.
''' </summary>
''' <param name="hwnd">Discovered Window handle</param>
''' <returns>1=keep going, 0=stop</returns>
Private Function EnumWindowProc(ByVal hwnd As Int32, ByVal lParam As Int32) As Int32
' Eliminate windows that are not top-level.
If GetParent(hwnd) = 0 AndAlso CBool(IsWindowVisible(hwnd)) Then
' Get the window title / class name.
Dim window As ApiWindow = GetWindowIdentification(hwnd)
' Match the class name if searching for a specific window class.
If _topLevelClass.Length = 0 OrElse window.ClassName.ToLower() = _topLevelClass.ToLower() Then
_listTopLevel.Add(window)
End If
End If
' To continue enumeration, return True (1), and to stop enumeration
' return False (0).
' When 1 is returned, enumeration continues until there are no
' more windows left.
Return 1
End Function
''' <summary>
''' Callback function that does the work of enumerating child windows.
''' </summary>
''' <param name="hwnd">Discovered Window handle</param>
''' <returns>1=keep going, 0=stop</returns>
Private Function EnumChildWindowProc(ByVal hwnd As Int32, ByVal lParam As Int32) As Int32
Dim window As ApiWindow = GetWindowIdentification(hwnd)
' Attempt to match the child class, if one was specified, otherwise
' enumerate all the child windows.
If _childClass.Length = 0 OrElse window.ClassName.ToLower() = _childClass.ToLower() Then
_listChildren.Add(window)
End If
Return 1
End Function
''' <summary>
''' Build the ApiWindow object to hold information about the Window object.
''' </summary>
Private Function GetWindowIdentification(ByVal hwnd As Integer) As ApiWindow
Const WM_GETTEXT As Int32 = &HD
Const WM_GETTEXTLENGTH As Int32 = &HE
Dim window As New ApiWindow()
Dim title As New StringBuilder()
' Get the size of the string required to hold the window title.
Dim size As Int32 = SendMessage(hwnd, WM_GETTEXTLENGTH, 0, 0)
' If the return is 0, there is no title.
If size > 0 Then
title = New StringBuilder(size + 1)
SendMessage(hwnd, WM_GETTEXT, title.Capacity, title)
End If
' Get the class name for the window.
Dim classBuilder As New StringBuilder(64)
GetClassName(hwnd, classBuilder, 64)
' Set the properties for the ApiWindow object.
window.ClassName = classBuilder.ToString()
window.MainWindowTitle = title.ToString()
window.hWnd = hwnd
Return window
End Function
End Class
''' Main 函数类开始
Imports System.Text
Module Module1
Private Declare Function SendMessage _
Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As String) As Int32
Const WM_GETTEXT As Int32 = &HD
Const WM_GETTEXTLENGTH As Int32 = &HE
Const WM_CREATE As Int32 = &H1
Const WM_SETTEXT = &HC
Sub Main()
Static count As Integer = 0
Dim enumerator As New WindowsEnumerator()
Dim sb As New StringBuilder()
For Each top As ApiWindow In enumerator.GetTopLevelWindows
count = 0
Console.WriteLine(top.MainWindowTitle)
For Each child As ApiWindow In enumerator.GetChildWindows(top.hWnd)
Console.WriteLine(child.MainWindowTitle)
'here you can find the value of control you want and can can set the required
' count = count + 1
' If (child.MainWindowTitle.Contains("Initial value in text box")) Then
' Console.WriteLine(count.ToString)
'Console.ReadKey()
'End If
'now find the count of ur control in the sample page and set the values
' If (count = 104 And top.MainWindowTitle.Contains("Form1")) Then
'SendMessage(child.hWnd, WM_SETTEXT, 0, "required Textbox value")
' End If
Next child
Next top
Console.Read()
End Sub
End Module
于 2013-03-08T04:22:39.267 回答
0
If you persist the data from one app to a means you feel is acceptable; database, text file, xml. Then one app updates the persisted data store and the other app checks the data store for the info.
于 2013-03-06T06:00:11.587 回答