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Thread: Retrieving information from another application

  1. #1

    Thread Starter
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    Jan 2014
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    33

    Retrieving information from another application

    Okay I've done a lot of Google searching and I am at the point where I think I just need one extra nudge to point me in the right direction. I'm using a program called TheRecord Player. It an audio player associated with digital court recordings. On the program itself it has a child window with a caption of "Current playtime" and a Class name "Static" Now I've got the code up to the point where the GETTEXT returns "Current playtime" But of course I don't want Current Playtime returned, I want the actual time that's shown in that Class name Static. I'm just not sure if it's possible to grab the current time from that window or not. Here's what I have:

    Public Class Form1
    Private Declare Function IsWindowVisible Lib "user32" Alias "IsWindowVisible" (ByVal hwnd As IntPtr) As Boolean
    Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
    Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
    Private Declare Function SendMessageByString Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As String) As Integer
    Private Const WM_GETTEXT As Integer = &HD
    Private Const WM_GETTEXTLENGTH As Integer = &HE

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    ' find msgbox
    Dim iHwnd As IntPtr = FindWindow("#32770", "TheRecord Player") ' replace vbNullString with msgbox Titlebar text for best results!
    If iHwnd <> IntPtr.Zero Then
    ' Enum: get top level child windows
    GetChildWindows(iHwnd)
    ' search for visible static class that has text
    For i As Integer = 0 To children.Count - 1
    If children(i).ClassName = "Static" Then
    ' test if visible (windows msgboxes can have multiple hidden static classes.)
    If IsWindowVisible(children(i).hWnd) = True Then
    Dim txt As String = GetText(children(i).hWnd)
    ' test text length
    If txt.Length > 1 Then
    MessageBox.Show(txt)
    Exit For
    End If
    End If
    End If
    Next
    Else
    MsgBox("window not found")
    End If
    End Sub

    Private Function GetText(ByVal WindowHandle As IntPtr) As String
    Dim TextLen As Integer = SendMessage(WindowHandle, WM_GETTEXTLENGTH, 0, 0) + 1
    Dim Buffer As String = New String(" "c, TextLen)
    SendMessageByString(WindowHandle, WM_GETTEXT, TextLen, Buffer)
    Return Buffer.Trim
    End Function

    End Class

    And I have a module1:

    Imports System.Runtime.InteropServices
    Module Module1



    Public Structure ChldInfo
    Public hWnd As IntPtr
    Public ClassName As String
    Public Sub New(ByVal hwnd As IntPtr, ByVal clsname As String)
    Me.hWnd = hwnd
    Me.ClassName = clsname
    End Sub
    End Structure
    Public children As List(Of ChldInfo)
    <DllImport("user32.dll", CharSet:=CharSet.Auto)> _
    Private Sub GetClassName(ByVal hWnd As System.IntPtr, ByVal lpClassName As System.Text.StringBuilder, ByVal nMaxCount As Integer)
    End Sub
    Private Delegate Function EnumCallBackDelegate(ByVal hwnd As IntPtr, ByVal lParam As IntPtr) As Integer
    Private Declare Function EnumChildWindows Lib "user32" (ByVal hWndParent As IntPtr, ByVal lpEnumFunc As EnumCallBackDelegate, ByVal lParam As IntPtr) As IntPtr
    Private Function EnumProc(ByVal hwnd As IntPtr, ByVal lParam As IntPtr) As Int32
    If hwnd <> IntPtr.Zero Then
    children.Add(New ChldInfo(hwnd, Get_ClassName(hwnd)))
    End If
    Return 1
    End Function
    Private Function Get_ClassName(ByVal hWnd As IntPtr) As String
    Dim sbClassName As New System.Text.StringBuilder("", 256)
    Call GetClassName(hWnd, sbClassName, 256)
    Return sbClassName.ToString
    End Function
    Public Sub GetChildWindows(ByVal hwnd As IntPtr)
    children = New List(Of ChldInfo)
    EnumChildWindows(hwnd, AddressOf EnumProc, Nothing)
    End Sub
    End Module


    so right now as I'm using the program TheRecord Player that child window is showing a value of 1:44:30 PM. I want to grab that text from it. Hopefully I've explained myself well enough. I'[m not sure how extensive someone is willing to help with this, but the program is available from fortherecord.com (The free player)

    Thanks in advance

  2. #2
    PowerPoster dunfiddlin's Avatar
    Join Date
    Jun 2012
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    8,242

    Re: Retrieving information from another application

    Hopefully I've explained myself well enough.
    Well we got there in the end after a fairly ropy start! Yeah, I don't mind taking a look at this but it may be a day or two.
    As the 6-dimensional mathematics professor said to the brain surgeon, "It ain't Rocket Science!"

    Reviews: "dunfiddlin likes his DataTables" - jmcilhinney

    Please be aware that whilst I will read private messages (one day!) I am unlikely to reply to anything that does not contain offers of cash, fame or marriage!

  3. #3
    PowerPoster dunfiddlin's Avatar
    Join Date
    Jun 2012
    Posts
    8,242

    Re: Retrieving information from another application

    I've had a quick look at this but I think you must be using an older version than the one currently available as I am unable to get even as far as you have. It certainly doesn't appear to be a standard textbox so there would be no way to obtain its contents. Sorry.
    As the 6-dimensional mathematics professor said to the brain surgeon, "It ain't Rocket Science!"

    Reviews: "dunfiddlin likes his DataTables" - jmcilhinney

    Please be aware that whilst I will read private messages (one day!) I am unlikely to reply to anything that does not contain offers of cash, fame or marriage!

  4. #4

    Thread Starter
    Member
    Join Date
    Jan 2014
    Posts
    33

    Re: Retrieving information from another application

    Well, I do appreciate you taking the time to look at it. I remembered a program called cheat engine or game hack where they look at the memory's address for changes in values in which you can narrow it down to the value you're looking for. Seems like that'd be quite the drawn out process to even think about using a method such as that to obtain these values. Ah well.. time to write to the software company and tell them to implement a global short cut key that grabs that time from their program

    Thanks again for the help.

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