请教怎么在绘制的矩形框中输入文字

void CTestUIDlg::OnPaint()
{
DlgParamInit();
//绘制按钮的文字;
}
BOOL CTestUIDlg::DlgParamInit()
{
    GetClientRect(ClientRect);//得到客户区坐标
    
    m_Step = (ClientRect.bottom-ClientRect.top)/10.0;
    CRect ButtonRect(0,0,INT(2*m_Step),int(m_Step));
    
    TitleRect.top = int(0.25*ButtonRect.Height());
    TitleRect.bottom  = int(1.75*ButtonRect.Height());
    TitleRect.left = ButtonRect.Height();
    TitleRect.right = ClientRect.right - ButtonRect.Height();
    
    TextRect.top = 2*ButtonRect.Height();
    TextRect.bottom = 9*ButtonRect.Height();
    TextRect.left = int(1.125*ButtonRect.Width());
    TextRect.right = int(ClientRect.Width()-1.125*ButtonRect.Width());
    
    //改变按钮位置
    GetDlgItem(IDC_BUTTON1)->MoveWindow(ClientRect.left,2*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON3)->MoveWindow(ClientRect.left,4*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON5)->MoveWindow(ClientRect.left,6*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON7)->MoveWindow(ClientRect.left,8*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON2)->MoveWindow(ClientRect.right-ButtonRect.Width(),2*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON4)->MoveWindow(ClientRect.right-ButtonRect.Width(),4*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON6)->MoveWindow(ClientRect.right-ButtonRect.Width(),6*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    GetDlgItem(IDC_BUTTON8)->MoveWindow(ClientRect.right-ButtonRect.Width(),8*ButtonRect.Height(),ButtonRect.Width(),ButtonRect.Height(),TRUE);
    
    //设置对话框中按钮字体大小
    ButtonFont.CreateFont(ClientRect.right/40,0, 0, 0, 700, false, false, 0, 1,
        OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,
        DEFAULT_PITCH | FF_SWISS | FF_SCRIPT | FF_ROMAN | FF_MODERN, "宋体");
    SendMessageToDescendants(WM_SETFONT,(WPARAM)HFONT(ButtonFont),MAKELPARAM(TRUE,0));

    //  设置标题区域形状及颜色
    CClientDC *pDC = new CClientDC(this);
    CBrush TitleBrush;
    TitleBrush.CreateSolidBrush(RGB(0,128,255));
    pDC->SelectObject(&TitleBrush);
    pDC->RoundRect(TitleRect, CPoint(40,40));
    
    pDC->RoundRect(TextRect, CPoint(30,30));
    
    //更改标题TextOut输出字体
    TitleFont.CreatePointFont(ClientRect.Height(),"华文行楷",NULL);
    pDC->SelectObject(&TitleFont);
    pDC->SetBkMode(TRANSPARENT);//让输出字体没有空白背景
    pDC->SetTextColor(RGB(0,0,255));

    return 0;

}

//按下按钮之后，绘制标题
BOOL CTestUIDlg::SetTitleTxt(CString Title)
{
    CClientDC *pDC = new CClientDC(this);

    CString x;
    x.Format(Title);

    //更改标题TextOut输出字体
    TitleFont.CreatePointFont(ClientRect.Height(),"华文行楷",NULL);
    pDC->SelectObject(&TitleFont);
    pDC->SetBkMode(TRANSPARENT);//让输出字体没有空白背景
    pDC->SetTextColor(RGB(0,0,255));
     pDC->DrawText(x,TitleRect,DT_CENTER);

    return 0;
}