API GetMessage Not a bitd1

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Not a bit of him, Masr! said Sam, putting Haleys rein in his hand, and holding his stirrup, while Andy was untying the other two horses.
Study While Read :
(Windows API Declare Function GetMessage Lib "user32" Alias "GetMessageA" (lpMsg As MSG, ByVal hwnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long) As Long)
The instant Haley touched the saddle, the mettlesome creature bounded from the earth with a sudden spring, that threw his master sprawling, some feet off, on the soft, dry turf.
Study While Read :
(Windows API Declare Function GetMessage Lib "user32" Alias "GetMessageA" (lpMsg As MSG, ByVal hwnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long) As Long)
Sam, with frantic ejaculations, made a dive at the reins, but only succeeded in brushing the blazing palm-leaf afore-named into the horses eyes, which by no means tended to allay the confusion of his nerves.
Study While Read :
(Windows API Declare Function GetMessage Lib "user32" Alias "GetMessageA" (lpMsg As MSG, ByVal hwnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long) As Long)
So, with great vehemence, he overturned Sam, and, giving two or three contemptuous snorts, flourished his heels vigorously in the air, and was soon prancing away towards the lower end of the lawn, followed by Bill and Jerry, whom Andy had not failed to let loose, according to contract, speeding them off with various direful ejaculations. And now ensued a miscellaneous scene of confusion. Sam and Andy ran and shouted,dogs barked here and there,and Mike, Mose, Mandy, Fanny, and all the smaller specimens on the place, both male and female, raced, clapped hands, whooped, and shouted, with outrageous officiousness and untiring zeal.d1
### Windows APIGetMessage 函数的功能解释 `GetMessage` 是 Windows API 提供的一个重要函数,主要用于从消息队列中检索消息。该函数的作用可以分为以下几个方面: #### 1. **功能概述** `GetMessage` 函数会从当前线程的消息队列中移除并返回一条消息[^2]。它通常用于基于消息驱动的应用程序框架中,比如传统的 Win32 GUI 应用程序。 #### 2. **参数说明** 以下是 `GetMessage` 的主要参数及其含义: - `LPMSG lpMsg`: 这是一个指向 `MSG` 结构的指针,用来存储接收到的消息。 - `HWND hWnd`: 指定窗口句柄。如果设置为 NULL,则表示检索任何属于调用线程的窗口的消息。 - `UINT wMsgFilterMin`: 定义要检索的消息范围的最小值。 - `UINT wMsgFilterMax`: 定义要检索的消息范围的最大值。 通过这些参数,开发人员能够灵活控制哪些类型的消息会被处理。 #### 3. **返回值解析** `GetMessage` 的返回值具有特定的意义: - 如果成功获取了一条非 `WM_QUIT` 消息,则返回一个大于零的值。 - 当接收到 `WM_QUIT` 消息时,返回值为零,这通常是应用程序退出的信号。 - 若发生错误(例如由于无效参数),则返回值为 `-1`。 这种设计使得开发者可以通过简单的条件判断来决定是否继续运行消息循环或终止程序。 #### 4. **典型应用场景** 在典型的 Win32 GUI 编程中,`GetMessage` 被嵌套在一个无限循环里,配合其他辅助函数共同完成事件分发的任务。下面展示了一个基本的例子: ```c #include <windows.h> int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { MSG msg; while (GetMessage(&msg, NULL, 0, 0)) { // 获取消息直到遇到 WM_QUIT TranslateMessage(&msg); // 将虚拟键消息转换为字符消息 DispatchMessage(&msg); // 分派消息给相应的窗口过程 } return static_cast<int>(msg.wParam); } ``` 此代码片段展示了如何利用 `GetMessage` 构建基础的消息泵逻辑,这是所有标准 Windows 图形界面应用的核心部分之一。 --- ###
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