载入背景图片

先载入一张图片, .。ID为IDB_BITMAP1


CBrush m_brBk;//在public中定义 

 

#pragma once// LoginDlg 对话框class LoginDlg : public CDialog{    DECLARE_DYNAMIC(LoginDlg)public:    LoginDlg(CWnd* pParent = NULL);   // 标准构造函数    virtual ~LoginDlg();// 对话框数据    enum { IDD = IDD_DIALOG_LogIn };protected:    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持    DECLARE_MESSAGE_MAP()public:    CString m_name;    CString m_password;    CBrush m_brBk ;    int log_time ;    afx_msg void OnBnClickedButtonlog();    afx_msg void OnBnClickedButtonloginexit();    virtual BOOL OnInitDialog();    afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);};

 

BOOL LoginDlg::OnInitDialog(){    CDialog::OnInitDialog();    CBitmap bmp ;    bmp.LoadBitmap(IDB_BITMAP1) ;    m_brBk.CreatePatternBrush(&bmp);    bmp.DeleteObject();    // TODO:  在此添加额外的初始化    return TRUE;  // return TRUE unless you set the focus to a control    // 异常: OCX 属性页应返回 FALSE}

 

 

 

打开类向导,找到WM_CTLCOLOR消息,重载得对应函数OnCtlColor(),添加如下:

HBRUSH LoginDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor){    HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);    if(pWnd == this)        return m_brBk ;    return hbr;}