I am working in vb with visual studio 2010.
The app AnyOrder is no longer supported and I am trying to make an app where our users can type in info and then have the info populate into AnyOrder (and also other sites - they have to populate a lot of redundant info) but I am having no luck at all getting the child windows of any order to populate once the data is in the VB window app.
I can get the parent window handle just fine but can't seem to get a child window handle to save my life. I can't even get the first level down and the blanks that I will need to populate are great grand-children of the parent window.
It won't let me post a screencap of the spy++ since I just signed up and don't have the 10 rep but here is a link to the capture.
Thank you in advance for any assistance that you can provide.
Figured out the answer somehow.
#Region "functions"
Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Int32
Public Delegate Function EnumWindowProcess(ByVal Handle As IntPtr, ByVal Parameter As IntPtr) As Boolean
<DllImport("User32.dll", SetLastError:=True, CharSet:=CharSet.Auto)>
Private Shared Function EnumChildWindows(ByVal WindowHandle As IntPtr, ByVal Callback As EnumWindowProcess, ByVal lParam As IntPtr) As Boolean
End Function
Private Shared Function EnumWindow(ByVal Handle As IntPtr, ByVal Parameter As IntPtr) As Boolean
Dim ChildrenList As List(Of IntPtr) = CType(GCHandle.FromIntPtr(Parameter).Target, Global.System.Collections.Generic.List(Of Global.System.IntPtr))
ChildrenList = CType(GCHandle.FromIntPtr(Parameter).Target, Global.System.Collections.Generic.List(Of Global.System.IntPtr))
If ChildrenList Is Nothing Then Throw New Exception("GCHandle Target could not be cast as List(Of IntPtr)")
ChildrenList.Add(Handle)
Return True
End Function
Private Shared Function GetChildWindows(ByVal ParentHandle As IntPtr) As IntPtr()
Dim ListHandle As GCHandle = GCHandle.Alloc(ChildrenList)
Try
EnumChildWindows(ParentHandle, AddressOf EnumWindow, GCHandle.ToIntPtr(ListHandle))
Finally
If ListHandle.IsAllocated Then ListHandle.Free()
End Try
Return ChildrenList.ToArray
End Function
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
iParentHandle = FindWindow(vbNullString, AOParentName)
GetChildWindows(FindWindow(vbNullString, AOParentName))
Dim Childlist As String = String.Join(". ", ChildrenList)
MsgBox("list of child windows: " & Childlist)
End Sub
Related
I am trying to detect whether or not a window is open (and being used by the user). I have used code from this forum but can't get it to work, here is what I've got:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Sub btnCheckWindow_Click(sender As Object, e As EventArgs) Handles btnCheckWindow.Click
Dim lngFindIt As Long
lngFindIt = FindWindow(vbNullString, "lkhsdlfhslfh")
If lngFindIt = 0 Then
MsgBox("It is not here")
Else
MsgBox("I found the sucker.")
End If
End Sub
Upon running the program and clicking a button I get "I found the sucker." despite definitely not having a window called "lkhsdlfhslfh" existing let alone open.
How do I fix this?
Your method signature is incorrect. It should return IntPtr, not Long.
Try the following:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Private Sub btnCheckWindow_Click(sender As Object, e As EventArgs) Handles btnCheckWindow.Click
Dim result As IntPtr= FindWindow(Nothing, "lkhsdlfhslfh")
If result = IntPtr.Zero Then
MsgBox("Window not found.")
Else
MsgBox("Found it.")
End If
End Sub
Alternatively, you could use <DllImport>, which is the standard way in .NET:
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)>
Private Shared Function FindWindow(
ByVal lpClassName As String,
ByVal lpWindowName As String) As IntPtr
End Function
Note that unless you're dealing with an ancient program, you should probably use a Unicode charset. This means using FindWindowW (instead of FindWindowA) if you go with Declare or CharSet.Unicode if you go with <DllImport>.
I'd like to use IsIconic function to check whether the specified window is minimized (iconic).
IsIconic function
https://msdn.microsoft.com/ja-jp/library/windows/desktop/ms633527(v=vs.85).aspx
My code works properly in certain environments, but it does not work in other environments.
Imports System.Runtime.InteropServices
Public Class Form1
<DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
Public Shared Function IsIconic(ByVal hWnd As IntPtr) As Long
End Function
<DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
Private Shared Function FindWindow(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim hWnd As IntPtr = FindWindow(Nothing, "Google - Google Chrome")
If CBool(IsIconic(hWnd)) Then
Debug.WriteLine("Chrome is iconic.")
Else
Debug.WriteLine("Chrome is not iconic.")
End If
End Sub
End Class
When I run it with 64 bit Windows 7 OS, I can determine correctly whether Chrome is iconified.
However, when running on 32 bit Windows 7 OS, "Chrome is iconic." is always displayed in the immediate window regardless of whether or not Chrome is actually iconified.
Could you tell me why this difference occurs?
Is this phenomenon caused by the difference in OS bit number? Or something else?
Your return type of the IsIconic() function is wrong.
This:
Public Shared Function IsIconic(ByVal hWnd As IntPtr) As Long
...should be this:
Public Shared Function IsIconic(ByVal hWnd As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
This also means that you can (and should) change:
If CBool(IsIconic(hWnd)) Then
Debug.WriteLine("Chrome is iconic.")
Else
...
to:
If IsIconic(hWnd) Then
Debug.WriteLine("Chrome is iconic.")
Else
...
I have a vb.net application which will be minimized to task bar or notification area. Is there any way for me to maximize/focus on that application when user presses a key (even if the user is using any other application).
Tried windows hot key but doesn't focus the app when it is already open.Please help
You require global hotkeys. First, add these functions to your application.
Private Declare Function GetKeyPress Lib "user32" Alias "GetAsyncKeyState" (ByVal key As Integer) As Integer
<DllImport("user32.dll", EntryPoint:="FindWindow", SetLastError:=True)> _
Private Shared Function FindWindow(lpClassName As String, lpWindowName As String) As IntPtr
End Function
<DllImport("user32.dll")> _
Private Shared Function ShowWindow(hWnd As IntPtr, nCmdShow As Integer) As Boolean
End Function
<DllImport("user32.dll")> _
Private Shared Function SetForegroundWindow(hWnd As IntPtr) As Integer
End Function
Next, add a Timer and in its Timer.Tick Event, use this function like this:
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
If GetKeyPress(Keys.LControlKey) And GetKeyPress(Keys.A) Then
Dim Handle As IntPtr = Process.GetProcessById(2916).MainWindowHandle
ShowWindow(Handle, 9)
SetForegroundWindow(Handle)
End If
End Sub
Set the Timer Interval to 150 to avoid repeated keypresses and make sure to enable the timer in the Form Load event.
I'm working on a VB.Net project where in part of it I catch a pop up message box when it's displayed and handle it in some way.
My problem is that I have to know what buttons are included in this pop up window (their captions mainly).
Is this possible? Can someone please tell me how this can be done? A sample would be much appreciated.
Thanks.
Update:
Since I got a down vote, and Ed Cottrell told me that this is because of not adding any code related to my question. Now I have the answer to my question so I'm adding some code:
My app catches a pop-up window displayed by another windows application, I used EnumWindows API to know when a new pop-up window is displayed.
Public Declare Function EnumWindows Lib "User32.dll" (ByVal WNDENUMPROC As EnumWindowDelegate, ByVal lparam As IntPtr) As Boolean
Delegate Function EnumWindowDelegate(ByVal hWnd As IntPtr, ByVal Lparam As IntPtr) As Boolean
When I catch this window, I use its handle that I got from EnumWindows result and get its child windows using EnumChildWindows (which are the controls I'm looking for , since controls are kind of windows too):
APIs I used
<DllImport("User32.dll")> _
Public Function EnumChildWindows _
(ByVal WindowHandle As IntPtr, ByVal Callback As EnumWindowProcess, _
ByVal lParam As IntPtr) As Boolean
End Function
Public Delegate Function EnumWindowProcess(ByVal Handle As IntPtr, ByVal Parameter As IntPtr) As Boolean
' Get window text length signature.
Public 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.
Public 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
Structure ApiWindow
Public Structure ApiWindow
Public MainWindowTitle As String
Public ClassName As String
Public hWnd As Int32
End Structure
Functions
Public Function GetChildWindows(ByVal ParentHandle As IntPtr) As IntPtr()
Dim ChildrenList As New List(Of IntPtr)
Dim ListHandle As GCHandle = GCHandle.Alloc(ChildrenList)
Try
EnumChildWindows(ParentHandle, AddressOf EnumWindow, GCHandle.ToIntPtr(ListHandle))
Finally
If ListHandle.IsAllocated Then ListHandle.Free()
End Try
Return ChildrenList.ToArray
End Function
Public Function EnumWindow(ByVal Handle As IntPtr, ByVal Parameter As IntPtr) As Boolean
Dim ChildrenList As List(Of IntPtr) = GCHandle.FromIntPtr(Parameter).Target
If ChildrenList Is Nothing Then Throw New Exception("GCHandle Target could not be cast as List(Of IntPtr)")
ChildrenList.Add(Handle)
Return True
End Function
Now when I have the handle of pop-up window (parentHandle), I can get its children windows:
Dim hndls() As IntPtr = GetChildWindows(parentHandle)
Dim window As ApiWindow
For Each hnd In hndls
window = GetWindowIdentification(hnd)
'Add Code Here
Next
Where GetWindowIdentification is:
''' <summary>
''' Build the ApiWindow object to hold information about the Window object.
''' </summary>
Public 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
' Set the properties for the ApiWindow object.
window.MainWindowTitle = title.ToString()
window.hWnd = hwnd
Return window
End Function
I found this answer on the net on another website, I thought I should share it in case someone sees this question in the future:
Buttons are nothing but more windows. You just look for more child
windows of the message box window you found. You can NOT just get
the handle from a window and then try to cast it to a Form object and
expect all the properties to work. It just doesn't work that way.
I want to send "{TAB}" Key to another application window(send the key to the window not to textbox).
I tried:
SendMessage(hWnd, WM_SETHOTKEY, VK_TAB, 0)
Nothing happened.
my goal is:
send tab key to my application Or other application when the application window is not in focus.
(i know that sendkey is not professional in this case there is no choice(This is the first time that I'm using it).)
I made many attempts and I always returned to the same result:
Nothing happened.
Does anyone know the answer?
SendKeys requires the application that you are sending the Keys to, to be active.
From above Link:
Use SendKeys to send keystrokes and keystroke combinations to the active application.
I order to get around this limitation you will have to resort to using the WinApi Functions.
FindWindow pInvoke.net
FindWindowEx pInvoke.net
sendMessage pInvoke.net
See this MSDN Forum Post for an example
Here is a modified example from that Posting:
Public Class Form1
Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" _
(ByVal hWnd As IntPtr, ByVal hWndChildAfterA As IntPtr, ByVal lpszClass As String, ByVal lpszWindow As String) As IntPtr
Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As IntPtr, ByVal lParam As String) As IntPtr
Const WM_SETTEXT As Integer = &HC
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim destination As IntPtr = FindWindow(Nothing, "Untitled - Notepad")
Dim destControl As IntPtr = FindWindowEx(destination, IntPtr.Zero, "Edit", Nothing)
SendMessage(destControl, WM_SETTEXT, IntPtr.Zero, "Hello" & vbTab & "GoodBye" & vbCrLf)
End Sub
End Class
Added an Additional Example using WM_KEYDOWN I created another small application with the Window Title set to TestForm and overrode the WndProc Method to determine if the application got the TabKey.
Sending Form
Public Class Form1
Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As IntPtr
Const WM_KEYDOWN As Integer = &H100
Const VK_TAB As Integer = &H9
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim destination As IntPtr = FindWindow(Nothing, "TestForm")
SendMessage(destination, WM_KEYDOWN, VK_TAB, 0)
End Sub
End Class
Test Form
Put a breakpoint on MyBase.WndProc(m) and look at m to see what has been sent.
Public Class Form1
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
MyBase.WndProc(m)
End Sub
End Class
Having struggled with this type of this a few times before, i would suggest a couple of things to look at.
The 1st is autoit which includes a dll you can reference from vb.net, and is very simple you use, and well documented. I tend to use that whenever i need to control a 3rd party program.
The other is the ui automation classes
See this for an example:
http://blog.functionalfun.net/2009/06/introduction-to-ui-automation-with.html
you need make the other window active first. check Change focus to another window in VB.NET . then use send key.