FQ/db2b0a23a0.png' alt='Install Direct3d For Vista' title='Install Direct3d For Vista' />Windows Vista includes a major update to the Direct3D API. Originally called WGF 2. Windows Graphics Foundation 2. DirectX 10 and DirectX Next. Free Download DirectX Software Development Kit June 2010 9. The complete DirectX SDK containing all DirectX software required to create Dir. D3D10XP/D3D10onXP2-big.png' alt='Install Direct3d For Vista' title='Install Direct3d For Vista' />C Screen capture with Direct. D 9 API Hooks. Since investigating screen capture techniques for Direct. D 9 applications a year ago I have wanted to look into hooking the Direct. D 9 API to utilise the much faster Get. Back. Buffer for my screen captures. Well here it is at last a mostly managed C solution providing easy and safe hooking of the Direct. D 9 API thanks to Easy. Hook, supporting both 3. Update 1. 4th March 2. Direct. 3D 1. 0 and 1. Update 1. 6th April 2. ZYWp2IAebCg/hqdefault.jpg' alt='Install Direct3d For Vista' title='Install Direct3d For Vista' />
Windows getting confused about which applicationwindow should be in the foreground. Also fixed bug where the width height of the region to capture were needlessly being adjusted for the x. RECT Slim. DX now marshals the Rectangle to a RECT with this conversion for us. Skip to download. Overview. I have tried two approaches to hooking the Direct. D Device Hooking and Interface Wrapping and Hooking VTable function addresses. Bushfire Press Advance Australia Fair Music'>Bushfire Press Advance Australia Fair Music. My final implementation uses the later as it is the simpler and more effective approach for my needs. Both approaches use DLL injection to directly access the address space of the target application DLL injection is a technique used to run code within the address space of another process by forcing it to load a dynamic link library. DLLinjectionBoth approaches also use function hooking, or API hooks often referred to as a detour after the Microsoft Detours library http research. Function hooking is implemented by changing the very first few code instructions of the target function to jump to an injected piece of code. HookingHooking and Interface Wrapping. This approach involves first hooking the Direct. DCreate. 9 method within d. IDirect. 3D9 instance wrapping the original IDirect. D9 instance within an Interface Wrapper class. This allows us to intercept the call to IDirect. D9. Create. Device that creates the IDirect. DDevice. 9 and in turn wrap the IDirect. DDevice. 9 within another Interface Wrapper thus providing interception for all the interface members. An Interface Wrapper works like so The wrapper class implements an interface and takes an object implementing this interface as a constructor parameter. Each implemented method of the wrapper then calls the corresponding method of this original object allowing additional logic to be included before and after the original object is called. This allows you to easily intercept and respond to each of the methods exposed by the interface. However there is a lot of extra code that needs to be created as you have to fully duplicate the original interface and in every method call the original wrapped object. To work effectively with Direct. D this approach also requires that the host application be running and hook the Direct. DCreate. 9 within the target application before the target application has finished initialising its usage of Direct. D Direct. 3DCreate. Direct. 3D9 application, and usually only once. This introduces potential timing issues, and does not allow you to hook a target application that is already running a minor inconvenience really. I stumbled across this approach to hooking the Direct. D API thanks to the Direct. D Starter. Kit v. There is plenty of other interesting information for dealing with Direct. D there. Hooking VTable function addresses. This approach involves using the Virtual Method Table VTable of an IDirect. DDevice. 9 instance to determine the address of each of its virtual methods so that we are then able to install a detour around any of those that we wish to hook. VTable is a mechanism used in a programming language to support dynamic dispatch or run time method binding. 2G Live Tv Pc. This supports the inheritance hierarchy whereby a virtual function points to different implementations for each sub class http en. Virtualmethodtable. To access the VTable requires that we first create a temporary IDirect. DDevice. 9 instance within the injected code. It is then simply a matter of obtaining a pointer to the VTable and iterating through to retrieve the method pointers. To retrieve each of the function addresses requires that you know the order of the functions in the class see d. Direct. X SDK and their parameters. Because they are functions of an object, each has an additional parameter representing this that you need to take into consideration when hooking. The pros for this method are that the target application does not have to be started after the host application the hooks can be installed at any time and more importantly only a very small amount of native CC code is required to do the VTable address lookups, allowing the majority to be implemented in C Its probably possible to do the vtable lookup directly in C but I havent tried. A con of this approach is that you have to create a temporary Direct. D device to be able to get a pointer to the VTable, which may or may not impact upon the target application I have yet to experience any ill effects. The provided solution here was implemented using this method after having already completed an example using the first approach. When preparing the code for this post I decided it was far too complicated and pursued the VTable route. Stuff you need first. Some things youll need Microsoft Visual Studio 2. C and C environment install the optional 6. C compiler if requiredMicrosoft Direct. X SDK February 2. Direct. X versions. This is required to build the C helper DLL. Easy. Hook 2. 6 Stable Easy. Hook is an open source library released under the LGPL that supports extending hooking unmanaged code APIs with pure managed ones, from within a fully managed environment like C using Windows 2. SP4 and later including 6. XPVistaWin. 7Server. Slim. DX February 2. Slim. DX is an open source managed framework for the Direct. X API supporting all manner of Direct. X both 3. 2 and 6. See http slimdx. Download the End User Runtime or if you want the samples grab the Developer SDK http www. A Brain needless to say all of the above is fairly useless if you dont bring one of these along for the ride. It might also be useful if your brain has a working knowledge of C, understands some basics of Direct. D programming and at least knows what an API hook is and why you might want to use one in the context of Direct. D applications. Implementation. The first thing we need to do is implement the Marshal. By. Ref. Object class referred to as the clientserver interface object or simply interface to be used by the host application and clientinjected assembly to communicate via an IPC channel. We also need to create the client assembly that will be injected into the target application, all with the help of Easy. Canadian Home Workshop Magazine Er. Hook. For my example I want the injected assembly to take a copy of the back buffer during End. Scene when requested to do so by the host application and convert it to a Bitmap object. The marshalled object will do three things Send a request for a screenshot from the host process to the injected assembly. Return the screenshot result from the injected assembly back to the host process. Provide a method by which the injected assembly can ping the host process and know that it needs to continue checking for screenshot requests or not. Allow debug messages from the injected assembly back to the host process. The injection assembly will be the client for the IPC server. Using Easy. Hook we will inject this into the target application and call its Run method.