// DragDialogDlg.cpp : implementation file//#include "stdafx.h"#include "DragDialog.h"#include "DragDialogDlg.h"#ifdef _DEBUG#define new DEBUG_NEW#endif// CDragDialogDlg dialogCDragDialogDlg::CDragDialogDlg(CWnd* pParent /*=NULL*/) : CDialog(CDragDialogDlg::IDD, pParent) , m_mousedown(false){ m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}void CDragDialogDlg::DoDataExchange(CDataExchange* pDX){ CDialog::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CDragDialogDlg, CDialog) ON_WM_PAINT() ON_WM_QUERYDRAGICON() //}}AFX_MSG_MAP ON_WM_NCHITTEST() ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() END_MESSAGE_MAP()// CDragDialogDlg message handlersBOOL CDragDialogDlg::OnInitDialog(){ CDialog::OnInitDialog(); // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon // TODO: Add extra initialization here m_mousedown = true; return TRUE; // return TRUE unless you set the focus to a control}// If you add a minimize button to your dialog, you will need the code below// to draw the icon. For MFC applications using the document/view model,// this is automatically done for you by the framework.void CDragDialogDlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // Center icon in client rectangle int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); }}// The system calls this function to obtain the cursor to display while the user drags// the minimized window.HCURSOR CDragDialogDlg::OnQueryDragIcon(){ return static_cast<HCURSOR>(m_hIcon);}UINT CDragDialogDlg::OnNcHitTest(CPoint point){ CRect r; GetClientRect(&r); ClientToScreen(&r); if(r.PtInRect(point)) { if(m_mousedown) { return HTCAPTION; } } return CDialog::OnNcHitTest(point);}void CDragDialogDlg::OnLButtonDown(UINT nFlags, CPoint point){ m_mousedown = true; CDialog::OnLButtonDown(nFlags, point);}void CDragDialogDlg::OnLButtonUp(UINT nFlags, CPoint point){ m_mousedown = false; CDialog::OnLButtonUp(nFlags, point);}