1. Chapter 1
Hello, MFC

2. Windows Programming SDK and API MFC Based on C-language
Software Development Kit软件开发工具箱/包
Application Programming Interface应用程序接口
MFC
Microsoft Foundation Class Library微软基础类库
Makes Windows programming simpler
Microsoft Developer Network微软开发者网络
Windows API：Windows application programming interface（WIndows应用程序接口） Platform SDK:Platform Software Development Kit（平台软件开发工具包） 在概念上，SDK是一系列文件的组合，包括lib、dll、.h、文档、示例等等；API是对程序而言的，提供用户编程时的接口，即一系列模块化的类和函数。可以认为API是包含在SDK中的。

3. Windows Programming Model
Event-driven事件驱动 programming model
Procedural过程化 programming model

4. Windows Programming Model
Event
- Keystroke
- Mouse click
Command
WM_QUIT message terminates msg loop

5. Common Windows Messages
Sent When
WM_CHAR
A character is input from the keyboard
WM_COMMAND
The user selects an item from a menu, or a control sends a notification to its parent
WM_CREATE
A window is created
WM_DESTROY
A window is destroyed
WM_LBUTTONDOWN
The left mouse button is pressed
WM_LBUTTONUP
The left mouse button is released
WM_MOUSEMOVE
The mouse pointer is moved
WM_PAINT
A window needs repainting
WM_QUIT
The application is about to terminate
WM_SIZE
A window is resized

6. Four Input Parameters of Windows Message
Handle of the window 窗口句柄
Message ID 消息编号
wParam 消息参数
lParam 消息参数

7. Handle of the window 32-bit value Uniquely identifies a window 窗口的唯一标识
References a data structure in which Windows stores relevant information about the window

8. Message ID A numeric value that identifies the message type
WM_CREATE, WM_PAINT, etc.

9. wParam, lParam wParam lParam Information specific to the message type
Example
WM_LBUTTONDOWN
wParam
Holds a series of bit flags identifying the state of the Ctrl and Shift keys and of the mouse buttons
lParam
Holds two 16-bit values identifying the location of the mouse pointer when the click occurred

10. Window Program Structure

11. Windows Programming, SDK-Style
int WINAPI WinMain (…) { wc.style = 0; // Class style … wc.lpszClassName = "MyWndClass"; RegisterClass (&wc); hwnd = CreateWindow (…); ShowWindow (hwnd, nCmdShow); UpdateWindow (hwnd); while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg); DispatchMessage (&msg); } return msg.wParam; }

12. Windows Programming, SDK-Style
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { PAINTSTRUCT ps; HDC hdc; switch (message) { case WM_PAINT: hdc = BeginPaint (hwnd, &ps); Ellipse (hdc, 0, 0, 200, 100); EndPaint (hwnd, &ps); return 0; case WM_DESTROY: PostQuitMessage (0); } return DefWindowProc (hwnd, message, wParam, lParam);

13. http://nojob.blog.51cto.com/1611772/320218 《Windows程序设计》第三章学习心得（1）|图解消息机制

14. Introducing MFC An object-oriented面向对象 wrapper around the Windows API
Application framework应用程序框架
Encapsulates virtually every aspect of a program's operation
Afx

15. Benefits of Using C++ and MFC
Object-oriented面向对象 design methodology
Framework uses a lot of tricks to make Windows objects
Windows 一般窗口
Dialog boxes 对话框
Controls 控件

16. The MFC Design Philosophy
Object-oriented interface to the Windows
Reusability, self-containment, etc.
Minimized the overhead

17. Document/View Architecture
CDocument 文档类（data）
Cview 视图类（display）
To separate processed data and it’s display

18. The MFC Class Hierarchy
CObject
Serialization support
Run-time class information support
Diagnostic and debugging support

19. AFX Functions Global functions Begin with Afx AfxRegisterWndClass()
Registers a custom WNDCLASS for an MFC application
AfxMessageBox(…)
display a messagebox window

20. First MFC Application How classes are derived from the MFC
How classes are plugged into the application
CWinApp class Application
CFrameWnd class Main Window
CPaintDC class
Message mapping

21. Header File (hello.h)
class CMyApp : public CWinApp { public: virtual BOOL InitInstance (); }; class CMainWindow : public CFrameWnd CMainWindow (); protected: afx_msg void OnPaint (); DECLARE_MESSAGE_MAP ()

22. Source File (hello.cpp)
#include <afxwin.h> #include "Hello.h" CMyApp myApp; ////////////////////////////////////////////////////// / // CMyApp member functions BOOL CMyApp::InitInstance () { m_pMainWnd = new CMainWindow; m_pMainWnd->ShowWindow (m_nCmdShow); m_pMainWnd->UpdateWindow (); return TRUE; }

23. Source File (hello.cpp)
// CMainWindow message map and member functions BEGIN_MESSAGE_MAP (CMainWindow, CFrameWnd) ON_WM_PAINT () END_MESSAGE_MAP () CMainWindow::CMainWindow () { Create (NULL, _T ("The Hello Application")); } void CMainWindow::OnPaint () CPaintDC dc (this); CRect rect; GetClientRect (&rect); dc.DrawText (_T ("Hello, MFC"), -1, &rect, DT_SINGLELINE ¦ DT_CENTER ¦ DT_VCENTER);