hello.cpp

《MFC Windows程序设计(第二版)》.rar

#define _WIN32_WINNT 0x0400
#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 ()
	ON_WM_MOUSEMOVE ()
ON_MESSAGE (WM_MOUSELEAVE, OnMouseLeave)
ON_MESSAGE (WM_MOUSEHOVER, OnMouseHover)

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);
}


void CMainWindow::OnMouseMove (UINT nFlags, CPoint point)
{
    if (!m_bMouseOver) {
        TRACE (_T ("Mouse enter\n"));
        m_bMouseOver = TRUE;

        TRACKMOUSEEVENT tme;
        tme.cbSize = sizeof (tme);
        tme.dwFlags = TME_HOVER | TME_LEAVE;
        tme.hwndTrack = m_hWnd;
        tme.dwHoverTime = HOVER_DEFAULT;
        ::TrackMouseEvent (&tme);
    }
}

LRESULT CMainWindow::OnMouseLeave (WPARAM wParam, LPARAM lParam)
{
    TRACE (_T ("Mouse leave\n"));
    m_bMouseOver = FALSE;
    return 0;
}

LRESULT CMainWindow::OnMouseHover (WPARAM wParam, LPARAM lParam)
{
    TRACE (_T ("Mouse hover (x=%d, y=%d)\n"),
        LOWORD (lParam), HIWORD (lParam));

    TRACKMOUSEEVENT tme;
    tme.cbSize = sizeof (tme);
    tme.dwFlags = TME_HOVER | TME_LEAVE;
    tme.hwndTrack = m_hWnd;
    tme.dwHoverTime = HOVER_DEFAULT;
    ::TrackMouseEvent (&tme);
    return 0;
}