Código
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
Y la uso de esta manera, pero solo obtengo el "main" handle:
Código
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim enumerator As New WindowsEnumerator() For Each top As ApiWindow In enumerator.GetTopLevelWindows() If top.MainWindowTitle.ToLower.Contains("firefox") Then RichTextBox1.Text += vbNewLine & ("main handle: " & top.MainWindowTitle) For Each child As ApiWindow In enumerator.GetChildWindows(top.hWnd) RichTextBox1.Text += vbNewLine & ("child handle: " & " " + child.MainWindowTitle) Next End If Next top End Sub
Así que algo está mal.
Lo que quiero es obtener todos los handles de un proceso, como por ejemplo el output que nos da la utilidad CommandLine "CMDOW" con este comando:
Código:
C:\>cmdow | find /i "firefox"
Código:
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