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Visual C++串口通信开发入门与编程实践

CStartUpDlg dlg;
    m_pMainWnd=&dlg;
    int nResponse=d1gdlg.DoModal();
    if (nResponse==IDOK)
    {}
    else if (nResponse==IDCANCEL)
    {}
    return FALSE;
CStartUpDlg::CStartUpDlg(CWnd* pParent /*=NULL*/)
    :CDialog(CStartUpDlg::IDD, pParent)
{
m_hIcon=AfxGetApp()->Loadlcon(IDR_MAINFRAME);
    p_Bitmap=new CBitmap;
    p_MemoryDC=new CDC;
    b_BitmapLoaded=FALSE;
}
BOOL CStartUpdlg::OnInitDialog()
{
  CDialog::OnInitDialog();
  CPaintDC dc(this);
  p_MemoryDC->CreateCompatibleDC(&dc);
  p_Bitmap->LoadBitmap(IDB_BACKGROUND);
  BITMAP m_Bitmap;
  p_Bitmap->GetBitmap(&m_ Bitmap);
  p_Bitmap->SetBitmapDimension(m_Bitmap.bmWidth, m_Bitmap.bmHeight);
  p_MemoryDC->SelectObject(p_Bitmap);
  b_BitmapLoaded = TRUE;
  SetWindowPos(&wndTopMost,
               0,
               0,
               GetSystemMetrics(SM_CXSCREEN),
               GetSystemMetrics(SM_CYSCREEN),
               SWP_SHOWWINDOW);
  //生成两个按钮
  p_0K_Button = new CMyBtn(RGB(255, 255, 255));
  p_Exit_Button = new CMyBtn(RGB(255, 255, 255));
  CRect m_bPos;
  int height, width;
  height = GetSystemMetrics(SM_CYSCREEN) / 15;
  width = GetSystemMetrics(SM_CXSCREEN) / 8;
  height *= 2;
  width *= 2;
  //设置确定按钮的位置
  m_bPos.SetRect((GetSystemMetrics(SMes CXSCREEN) - width) / 3,
    GetSystemMetrics(SMes CYSCREEN) - height * 3 / 2,
    (GetSystemMetrics(SM_CXSCREEN) - width) / 3+width / 2,
    GetSystemMetrics(SMee CYSCREEN) - height);
  p_OK_Button->Create("确定", BS_OWNERDRAW | WS_CHILD | WS_VISIBLE
    | WS_TABSTOP, m_bPos, this, MY_OK_BUTTON);
  p_OK_Button->ShowWindow(SW_SHOW);
  //设置退出按钮的位置
  m_Pos.SetRect((GetSystemMetrics(SM_CXSCREEN) - width) *2 / 3
    +width / 2, GetSystemMetrics(SM_CYSCREEN) - height * 3 / 2,
    (GetSystemMetrics(SM_CXSCREEN) - width) *2 / 3+width,
    GetSystemMetrics(SM_CYSCREEN) - height);
  p_Exit_Button->Create("退出", BS_OWNERDRAW | WS_CHILD |
    WS_VISIBLE | WS_TABSTOP, m_bPos, this, MY_EXIT_BUTTON);
  p_Exit_Button->ShowWindow(SW_SHOW);
  return TRUE; // return TRUE unless you set the focus to a control
}
CSize m_SrcSize;
m_SrcSize = p_itmap->GetBitmapDimension();
RECT m_DestRect;
GetClientRect(&m_DestRect);
if (b_BitmapLoaded)
{
  CPaintDC dc(this);
  dc.StretchBlt
  (
    m_DestRect.left,
    m_DestRect.top,
    m_DestRect.right - m_DestRect.left,
    m_DestRect.bottom - m_DestRect.top,
    p_MemoryDC,
    0,
    0,
    m_SrcSize.cx,
    m_SrcSize.cy,
    SRCCOPY
  );
}
    void CStartUpDlg::OnOK()
    {}
    void CStartUpDlg::OnCancel()
    {}
void CStartUpDlg::OnOKButton()
{
  HWND hWnd = GetSafeHwnd();
  ShellExecute(hWnd, "open", "e:\\debug\\commtest.exe", NULL, NULL,
    SW_SHOWNORMAL);
  DestroyWindow();
}
void CStartUpDlg::OnExitButton()
{
  if (MessageBox("确定退出该应用程序吗？", "确认框",
    MB_ICONQUESTION | MB_OKCANCEL) == 2)
    return ;
  CDialog::OnCancel();
}
if (pMsg->message == WM_ KEYDOWN)
{
  char StringOut[128];
  sprintf(StringOut, "the key value is %d\n", pMsg->wParam);
  OutputDebugString(StringOut);
  switch (pMsg->wParam) //the key value
  {
    case 13:
      //Enter
      if (GetFocus() == GetDlgItem(MY_OK_BUTTON))
      {
        OnOKButton();
        return TRUE;
      }
      else if (GetFocus() == GetDlgltem(MY_EXIT_BUTTON))
      {
        OnExitButton();
        return true;
      }
      break;
  }
}