File descriptor and Kernel File handle of VC ++
This article describes the relationship between C language in VC ++ and the kernel file handle using the code file descriptor (file descriptor), and the conversion function _ get_osfhandle between the two, _ open_osfhandle and the risks of using them. In Windows code, do not share the file description symbols and Kernel Ha
After 2 nights of "Thunder and lightning" torture, I also slightly began to the full screen of bullets a little hand, can say I feel the MI bluetooth handle. (Thanks to the overweight cubs love to eat ice cream to provide test samples)The game handle story is this, first of all, people are nostalgic. Although there is no longer a young day to learn to want to get into the street of the game room of the kind
1. How to obtain a window handle?For example, you can obtain the handle of the window picturebox control (which can be used by other controls,Intptr handle = picturebox. Handle;
2. Note: The process of creating a window is totally different from that of creating a window !!!
When a window is created, there is no
1. How to get a handle to a window.For example, to get a handle to a window PictureBox control (which other controls can also),
INTPTR handle = Picturebox.handle;
2, note: Window creation and window creation is a handle is completely different ...When a window is created, the window does not create a
The So-called handle is actually a data, which is a long (full-length) data. A handle is a unique integer used by wondows to identify objects that are created or used by the application, and Windows uses a variety of handles to identify such as application instances, Windows, controls, bitmaps, GDI objects, and so on. The Windows handle is somewhat like a file
create kernel objects have a pointer to the SEC URITY_ATTRIBUTES structure as its parameter.
Most applications create objects with default security by passing NULL values. To restrict access to objects, you must create a SECURITY_ATTRIBUTES object and initialize it.
2. What is a handle?
Common Concept: A handle is a unique integer used by WONDOWS to identify objects created or used by applications. WINDOW
What is a handle (Windows OS)
FavoritesA handle is a unique integer used by wondows to identify objects created or used by applications. Windows uses various handles to identify application instances, windows, controls, bitmaps, and GDI objects. A Windows handle is a bit like a file handle in C.
From the above definit
A simple point-coordinate classClass Point {PublicPoint (): Xval (0), Yval (0) {}Point (int x,int y): Xval (x), Yval (y) {}int x () const {return xval;}int y () const {return yval;}point x (int xv) {xval = XV; return *this;}point y (int yv) {yval = YV; return *this;}Privateint Xval, yval;};Bind the handle to it on a layer of encapsulationControlling those operations through handle exposes those operations t
This article said that the original is somewhat far-fetched. As the topic says, more is the summary of the predecessors ' methods. The original intention of writing is not a technical study, but a job demand.
Methods involved in some functions need to mention the right, in fact, I always thought that the standard on the Internet to raise the right function is useless, until this writing program I just know that there is a real need to mention the right. Now attach a relatively good-looking right
This article uses WinDbg to understand how functions in a program use handle to query a handle table. So first to open the Win7 under the WinDbg and debugging functions.
Solve the kernel debugging problem under Win7
Win7 Debug is not available for kernel debugging by default (! Process and other commands are not available), unless it is a dual-machine debug. or use LIVEKD for debugging. Try th
Handle table with kernel object One, what is a handle table what is a kernel object. 1. Handle Table GenerationWe know. When we use CreateProcess, we return a process handle. and the thread handle. In fact, when calling CreateProcess. A new eprocess structure is created in t
Afxgetmainwnd
Afxgetmainwnd
Hwnd = afxgetmainwnd ()-> m_hwnd;
GettopwindowFunction: This function checks the subwindow Z sequence associated with a specific parent window (Z sequence: vertical screen direction, that is, stacked order ), return the handle of the subwindow at the top of the Z-order.Function prototype: hwnd gettopwindow (hwnd );Parameters:Hwnd: handle of the parent window in the queried order
Original URL: http://www.pythonschool.com/CPP_JHK/5003.html
Gets the handle of the class window
this->m_hwnd; This is a pointer to an instance of the current class
Handle to the main window, get its own window handle
AfxGetMainWnd ()->m_hwnd;// in the main window class, or in the child window class, gets the main
The handle is actually a pointer to a certain resource, but it is different from the pointer: the pointer corresponds to a data address in the memory, and the pointer can be freely modified. Windows does not want a general program to modify its internal data structure, because it is too insecure. Therefore, Windows assigns a handle to each memory area declared by using functions such as globalalloc (essenti
C *** dialog * pwnd = (C *** dialog **) fromhandle (hwnd); // get the object pointer of the dialog box by the handle
Pwnd-> XXX (); // call the XXX () function in C *** dialog ();
Use the window function: cwnd * getwindow to get the window pointer. pwnd-> m_hwnd (the handle of the Windows window attached to this
Cwnd) At: fromhandle (hwnd); obtain the main window handl
Case analysis of handle leakingIn the previous article. NET object with Windows handle (ii): Handle classification and. NET Handle disclosure example, we have a handle leak example. The Datareceiver and Dataanalyzer objects were created and dispose of in the example many tim
1. What is a handle?In Windows, the handle is a 32-bit unsigned integer corresponding to the object. An object can be mapped to a unique handle or a unique object.2. Why do we need a handle?To be more accurate, a handle is required for Windows. Windows needs to provide progr
We monitor the platform has a alarm server, its main function is to receive the front end, TDDC, network Management servers, such as the alarm sent, and according to the alarm linkage configuration for the corresponding linkage operation, recently found in the server running process, through the Task Manager to view the number of its handle will continue to increase, so that the impact of other server work, Initial suspicion is a
Difference between thread ID and thread handle (reproduced)
The following are some conclusions:
● Createthread () API is used to create a thread. The API returns the same thread handle and thread ID ). The thread handle has full access to create a thread object. When a thread is running, the thread ID uniquely identifies the thread at the system level.● The ID
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