hello.cpp

《MFC Windows程序设计(第2版)》的书的第一章源码

#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;
}

/////////////////////////////////////////////////////////////////////////
// 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);

	//**************************
	CClientDC cliDc(this);
	cliDc.Ellipse(0,0,200,200);
	//**************************

    dc.DrawText (_T ("Hello, MFC"), -1, &rect,
        DT_SINGLELINE | DT_CENTER | DT_VCENTER);
}

void CMainWindow::OnLButtonDown(UINT nFlags, CPoint point)
{
	CRect rect;
	GetClientRect(&rect);

	CClientDC dc(this);

	dc.MoveTo(rect.left, rect.top);
	dc.LineTo(rect.right, rect.bottom);
	dc.MoveTo(rect.right, rect.top);
	dc.LineTo(rect.left, rect.bottom);
}