//由IDD_STATUS_DIALOG创建一个对话框
CDialog* pCheckNetStatusDlg = new CDialog();
pCheckNetStatusDlg->Create(IDD_STATUS_DIALOG, this);
RECT statusWndClientRect, mainWndClientRect, mainWndRect;
pCheckNetStatusDlg->GetClientRect(&statusWndClientRect);
this->GetClientRect(&mainWndClientRect);
this->GetWindowRect(&mainWndRect);
pCheckNetStatusDlg->ShowWindow(SW_SHOW);
pCheckNetStatusDlg->MoveWindow((mainWndClientRect.right - statusWndClientRect.right) / 2 + mainWndRect.left,
(mainWndClientRect.bottom - statusWndClientRect.bottom) / 2 + mainWndRect.top,
statusWndClientRect.right, statusWndClientRect.bottom);
CString strStatus = "当前状态";
//修改IDC_STATIC_STATUS的文字
CWnd* pWndStatus = pCheckNetStatusDlg->GetDlgItem(IDC_STATIC_STATUS);
//设置新的文字
pWndStatus->SetWindowText(strStatus);
CDC* pDC = GetDC();
//计算文字长度
CSize sizeStatus = pDC->GetTextExtent(strStatus);
RECT rectStatus;
//得到文字在屏幕上的位置
pWndStatus->GetWindowRect(&rectStatus);
//设置文字位置
rectStatus.left = (rectStatus.left + rectStatus.right) / 2 - sizeStatus.cx / 2;
rectStatus.right = rectStatus.left + sizeStatus.cx;
pCheckNetStatusDlg->ScreenToClient(&rectStatus);
//调整大小
pWndStatus->MoveWindow(&rectStatus);
//刷新窗口 Invalidate()是发送一个命令WM_PAINT来重画窗口, WM_PAINT是优先级比较低的, UpdateWindow是立即重画, 优先级高
pCheckNetStatusDlg->UpdateWindow();