Contents
What is the entry point of a DLL?
A DLL can optionally specify an entry-point function. If present, the system calls the entry-point function whenever a process or thread loads or unloads the DLL. It can be used to perform simple initialization and cleanup tasks.
Which API call is used to load the DLL into the process?
LoadLibrary can be used to load a library module into the address space of the process and return a handle that can be used in GetProcAddress to get the address of a DLL function. LoadLibrary can also be used to load other executable modules.
How do DLL injectors work?
In computer programming, DLL injection is a technique used for running code within the address space of another process by forcing it to load a dynamic-link library. A program used to inject arbitrary code into arbitrary processes is called a DLL injector.
What is application entry point?
An application entry point identifies a resource that is an access point to an application. Application entry points are used to control users’ access to different versions of an application that is deployed on a platform. PROGRAM, URIMAP, and TRANSACTION resources can be declared as application entry points.
How do I run the main method in Visual Studio?
Run the program To start building the program, press the green Start button on the Visual Studio toolbar, or press F5 or Ctrl+F5. Using the Start button or F5 runs the program under the debugger. Visual Studio attempts to build and run the code in your project.
When to use the entry point function in a DLL?
The system calls the entry-point function in the context of the process or thread that caused the function to be called. This allows a DLL to use its entry-point function for allocating memory in the virtual address space of the calling process or to open handles accessible to the process.
How to retrieve a handle to a DLL module?
To retrieve a handle to the DLL module, call the LoadLibrary function with the name of the DLL. After you have obtained the handle, you can call the GetProcAddress function to retrieve a pointer to the hook procedure. Finally, use SetWindowsHookEx to install the hook procedure address in the appropriate hook chain.
How to disable the entry point function in Win32?
When a process unloads the DLL, the entry-point function is called only once for the entire process, rather than once for each existing thread of the process. You can use DisableThreadLibraryCalls to disable notification when threads are terminated. Only one thread at a time can call the entry-point function.
How to place a global hook procedure in a DLL?
You must place a global hook procedure in a DLL separate from the application installing the hook procedure. The installing application must have the handle to the DLL module before it can install the hook procedure. To retrieve a handle to the DLL module, call the LoadLibrary function with the name of the DLL.