In this article we will use only one tool, a famous and widely used analyzer / dissembler / debugger which is OllyDBG. Practicing reverse engineering includes mastering lot of tools, but mainly we are talking about tools like debuggers, dissemblers and hex editors. When practicing reversing and when we need to study a kind of software protection, reverse engineers usually make some stand alone applications which implement only the protection, in other words it simulates the behavior of a software protection, nothing more nothing less!Ī “ReverseMe” as its name says, is a little piece of code compiled to produce one or more protections, and the whole is designed to be “reversed”, which means designed to be a target for practicing reverse code engineering and studying software protections without any risk regarding laws and intellectual properties.

NumText = Marshal.Disassembling or debugging commercial programs is usually prohibited by international laws. I have tried the following solution which success in returning data if data is integer but if it contains any letter, result is 0: Dim tmpstr As IntPtr = Marshal.AllocHGlobal(100)ĭim NumText = API.SendMessage(Hwnd, API.WM_GETTEXT, 200, tmpstr ) Where GetClassByPosition returns control's handle by specifying parent handle, class name (static,edit or button) and classPosition (used in loop - not important for now)Īs I said, it works great with STATIC (labels etc) but it returns 0 if I'm retreiving text from EDIT (textbox) control of that external application.

Handler.GetWindowText(newHwnd, sb, sb.Length) My current code is here: Dim newHwnd As IntPtr = Handler.GetClassByPosition(ParentHwnd, cls, classPosition)ĭim length As Integer = Handler.GetWindowTextLength(newHwnd)ĭim sb As New String(' '.Chars(0), length + 1) As MSDN says, GetWindowText cannot retreive text from EDIT control but maybe you know another way of achieving this? I have no problem if control is 'static' but my code seems not working for 'edit' control. I am trying to retreive text from another application by app's control handle.

Getwindowtext msdn