VC++通过消息传送数据资源-CSDN文库

共43个文件

h：8个

cpp：6个

txt：4个

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在VC++中，消息传递是实现进程间通信（IPC，Inter-Process Communication）或对象间通信的一种常见方式。本文将详细探讨如何利用VC++通过消息系统来传输数据，特别是涉及网络编程的应用场景。我们需要了解Windows消息系统的基础。Windows操作系统提供了一个消息队列和消息循环机制，使得应用程序可以异步地接收和处理事件。在VC++中，我们可以使用`HWND`（窗口句柄）来标识一个窗口，并向该窗口发送消息。消息由`WM_xxx`定义，例如`WM_PAINT`用于窗口重绘，`WM_COMMAND`处理用户菜单或控件操作等。 1. **消息结构体**：在VC++中，`MSG`结构体封装了关于消息的所有信息，包括消息类型、发送者、接收者以及消息的额外参数。例如： ```cpp struct MSG { HWND hwnd; UINT message; WPARAM wParam; LPARAM lParam; DWORD time; POINT pt; }; ``` 2. **消息发送**：使用`PostMessage`或`SendMessage`函数可以向指定窗口发送消息。`PostMessage`是非阻塞的，而`SendMessage`会等待接收方处理完消息后再返回。例如： ```cpp PostMessage(hwnd, WM_USER, 123, 456); // 向hwnd发送自定义消息 ``` 3. **数据传输**：在消息中携带数据通常通过`wParam`和`lParam`字段。这两个参数可以是任何类型的数据，但通常转换为无符号整数（`WPARAM`）和长整型（`LPARAM`）。若需要传递复杂数据，可以使用指针或内存映射文件。 4. **网络编程结合**：在网络编程中，我们可能需要跨进程甚至跨机器传递数据。可以先将数据序列化（如JSON或XML），然后通过网络协议（如TCP/IP或UDP）发送。接收端解码数据并构造消息，再通过消息系统传递给相应的窗口或对象。 5. **自定义消息**：除了系统定义的消息外，开发者还可以自定义消息。自定义消息通常从`WM_USER`开始，以避免与系统消息冲突。例如： ```cpp #define MY_CUSTOM_MSG (WM_USER + 1) PostMessage(hwnd, MY_CUSTOM_MSG, 0, reinterpret_cast<LPARAM>(&myData)); ``` 6. **处理消息**：在窗口类的`WndProc`函数中，根据`message`字段判断接收到的消息类型，并执行相应的操作。例如： ```cpp LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { switch (msg) { case MY_CUSTOM_MSG: // 处理自定义消息，提取并处理lParam中的数据 break; // ... } } ``` 7. **多线程消息队列**：在网络编程中，通常会创建一个单独的线程来处理网络I/O，以避免阻塞主线程。这时，可以使用`PostThreadMessage`将网络接收的数据以消息的形式发送到线程的消息队列。通过以上步骤，VC++可以有效地实现数据的跨对象或跨进程传递，尤其在网络编程中，消息传递机制提供了灵活且可靠的通信方式。开发者需要注意数据的序列化和反序列化，以及线程同步问题，以确保数据的安全传输和正确处理。

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通过消息传送数据.rar （43个子文件）

254338511

Sender

Sender.rc 5KB

Sender.cpp 2KB

Sender.clw 1KB

Sender.dsp 4KB

SenderDlg.cpp 5KB

Sender.ncb 57KB

Sender.plg 2KB

resource.h 776B

res

Sender.rc2 398B

Sender.ico 1KB

Release

Sender.exe 20KB

Sender.h 1KB

ReadMe.txt 3KB

SenderDlg.h 1KB

Sender.opt 71KB

StdAfx.cpp 208B

Sender.dsw 537B

StdAfx.h 1KB

Sender.aps 35KB

readme.htm 223B

Receiver

Receiver.opt 71KB

ReceiverDlg.h 1KB

Receiver.cpp 2KB

Receiver.dsp 4KB

Receiver.aps 20KB

res

Receiver.ico 1KB

Receiver.rc2 400B

Release

Receiver.exe 20KB

Resource.h 538B

Receiver.ncb 57KB

ReadMe.txt 4KB

StdAfx.cpp 210B

Receiver.clw 1KB

Receiver.h 1KB

Receiver.dsw 541B

Receiver.plg 2KB

StdAfx.h 1KB

Receiver.rc 5KB

ReceiverDlg.cpp 4KB

Release

Receiver.exe 20KB

Sender.exe 20KB

Cn700.com.txt 3KB

readme.txt 2KB

======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : Receiver ======================================================================== AppWizard has created this Receiver application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your Receiver application. Receiver.dsp This file (the project file) contains information at the project level and is used to build a single project or subproject. Other users can share the project (.dsp) file, but they should export the makefiles locally. Receiver.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CReceiverApp application class. Receiver.cpp This is the main application source file that contains the application class CReceiverApp. Receiver.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. Receiver.clw This file contains information used by ClassWizard to edit existing classes or add new classes. ClassWizard also uses this file to store information needed to create and edit message maps and dialog data maps and to create prototype member functions. res\Receiver.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file Receiver.rc. res\Receiver.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// AppWizard creates one dialog class: ReceiverDlg.h, ReceiverDlg.cpp - the dialog These files contain your CReceiverDlg class. This class defines the behavior of your application's main dialog. The dialog's template is in Receiver.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named Receiver.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, and your application is in a language other than the operating system's current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don't do this, some of the UI elements of your application will remain in the language of the operating system. /////////////////////////////////////////////////////////////////////////////

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