Hello MFC 小记

// Hello.h
 1 class CMyApp : public CWinApp
 2 {
 3     public:
 4         virtual BOOL InitInstance ();
 5 };
 6 
 7 class CMainWindow : public CFrameWnd
 8 {
 9     public:
10         CMainWindow ();
11     　　afx_msg void OnLButtonDown(UINT nflags, CPoint point);
12 
13 protected:
14         afx_msg void OnPaint ();
15     　　afx_msg void OnLButtonUp(UINT nflags, CPoint point);
16         DECLARE_MESSAGE_MAP ()
17 };

//Hello.cpp
 1 #include <afxwin.h>
 2 #include "Hello.h"
 3 
 4 CMyApp myApp;
 5 
 6 /////////////////////////////////////////////////////////////////////////
 7 // CMyApp member functions
 8 
 9 BOOL CMyApp::InitInstance ()
10 {
11     m_pMainWnd = new CMainWindow;
12 //    m_pMainWnd->ShowWindow (m_nCmdShow);
13     m_pMainWnd->ShowWindow(SW_SHOWNORMAL);
14     m_pMainWnd->UpdateWindow ();
15     return TRUE;
16 }
17 
18 /////////////////////////////////////////////////////////////////////////
19 // CMainWindow message map and member functions
20 
21 BEGIN_MESSAGE_MAP (CMainWindow, CFrameWnd)
22     ON_WM_PAINT ()
23     ON_WM_LBUTTONDOWN()
24     ON_WM_LBUTTONUP()
25 END_MESSAGE_MAP ()
26 
27 CMainWindow::CMainWindow ()
28 {
29     Create (NULL, _T ("The Hello  Application"),WS_OVERLAPPEDWINDOW,CRect(0,0,720,360));
30 }
31 
32 void CMainWindow::OnPaint ()
33 {
34     CRect rect(100,100,500,500);
35     GetClientRect (&rect);
36 
37     CPaintDC dc (this);
38     
39     dc.DrawText (_T ("Hello, MFC"), -1, &rect,
40     DT_SINGLELINE | DT_CENTER | DT_VCENTER);
41 }
42 
43 void CMainWindow::OnLButtonDown(UINT nflags, CPoint point)
44 {
45     CRect rect;
46     GetClientRect(&rect);
47 
48     CClientDC dc(this);
49     dc.MoveTo(rect.left, rect.top);
50     dc.LineTo(rect.right, rect.bottom);
51 
52     /*dc.MoveTo(rect.left, rect.bottom);
53     dc.LineTo(rect.right, rect.top);*/
54 }
55 
56 void CMainWindow::OnLButtonUp(UINT nflags, CPoint point)
57 {
58     CRect rect;
59     GetClientRect(&rect);
60 
61     CClientDC dc(this);
62     dc.MoveTo(rect.left, rect.bottom);
63     dc.LineTo(rect.right, rect.top);
64 }