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- Dictionaryhandle/ˈhandl/
verb
- 1. feel or manipulate with the hands: "heavy paving slabs can be difficult to handle" Similar
- 2. manage (a situation or problem): "a lawyer's ability to handle a case properly" Similar
noun
- 1. the part by which a thing is held, carried, or controlled: "a holdall with two carrying handles"
- 2. a name or nickname: informal "that's some handle for a baby"
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May 24, 2009 · It's an abstract reference value to a resource, often memory or an open file, or a pipe. Properly, in Windows, (and generally in computing) a handle is an abstraction which hides a real memory address from the API user, allowing the system to reorganize physical memory transparently to the program. Resolving a handle into a pointer locks the ...
Feb 16, 2013 · 8. In C++/CLI, a handle is a pointer to an object located on the GC heap. Creating an object on the (unmanaged) C++ heap is achieved using new and the result of a new expression is a "normal" pointer. A managed object is allocated on the GC (managed) heap with a gcnew expression. The result will be a handle.
Jan 30, 2013 · A pointer is definitely different than a handle. A pointer is an address of something unspecified in memory. A pointer to a structure can be called a "handle" (usually by using 'typedef'). A handle is a concept used in writing the windows operating system. A pointer is a part of the C language.
Nov 8, 2010 · The header that actually typedefs HANDLE is winnt.h. Unfortunately this is 15K lines - here, so fixing your issue by including the slimline windef.h is a bit misleading. Here is the relevant part on my system (obviously the details could change from revision to revision, but won't change at the implementation level since this would break existing binaries):
Aug 7, 2010 · #define DECLARE_HANDLE(name) struct name##__{int unused;}; typedef struct name##__ *name Why do we need a pointer to an struct with a single int member with a weird name called unused ? And will we ever need to use a line of code like this one?
A handle is an abstract reference to some resource provided to you by another party (usually the OS), that you can hand back to the other party to reference that resource. OSes often contain a handle table containing entities that users have created (open files, created semaphores, processes, threads, ...); the handle is (often implemented as) an integer index into this table.
May 24, 2011 · There is a generic concept generally called a "handle" in the context of computer software APIs. In the comments you have probably found a link to the Wikipedia article on that subject. You are dealing with a specific implementation of a handle data type -- the IBM PC/DOS file handles returned from the int 0x21 interface.
Apr 29, 2009 · To understand event handlers, you need to understand delegates. In C#, you can think of a delegate as a pointer (or a reference) to a method. This is useful because the pointer can be passed around as a value. The central concept of a delegate is its signature, or shape. That is (1) the return type and (2) the input arguments.
Aug 4, 2013 · According to MSDN, HANDLE and HWND are defined as: HANDLE is a handle to an object. HWND is a handle to a window. So, a HWND is a HANDLE, but not all HANDLEs are HWND. In fact: typedef void *PVOID; typedef PVOID HANDLE; typedef HANDLE HWND; Example. You should only pass HWND to SetForegroundWindow unless you know what you are doing.
Jan 22, 2019 · There is no data type HANDLE declared in standard C. I can't say for sure but most likely this HANDLE is one of the standard Windows Data Types. It would have been introduced by: #include <windows.h>. A HANDLE is an opaque type used to represent a Win32 object, for example a file, a mutex, an event etc. answered Jan 20, 2012 at 17:32.
