C / C++ / MFC

<br />
BOOL CReadComDlg::ConfigureCOMPort()<br />
{<br />
  CString strPort;<br />
  BOOL fSuccess;<br />
  iCOMPortNumber = 4;  //looked at the device manager to get this<br />
<br />
  strPort.Format("COM%d", iCOMPortNumber) ;<br />
<br />
  //Create the handle for reading from the COM port<br />
  //--returns a valid handle--<br />
  m_hFile =  CreateFile( strPort,                    <br />
			 GENERIC_READ | GENERIC_WRITE,<br />
		         (DWORD)NULL,	// exclusive access<br />
 			 NULL,			// no security<br />
		         OPEN_EXISTING,<br />
			 FILE_ATTRIBUTE_NORMAL,<br />
			 NULL	);		// hTemplate<br />
<br />
  //Check weather the handle is valid or not<br />
  if (INVALID_HANDLE_VALUE == m_hFile)<br />
  {<br />
    AfxMessageBox( "ERROR 2: unable to connect to COM port." );<br />
    return FALSE;<br />
  }<br />
<br />
<br />
  // suggest the buffer sizes for the COM port.<br />
  //--this function fails, error code 995 but according to MSDN, this is <br />
  //only a suggestion to the hardware so i suppose it is okay that it fails.--<br />
  SetupComm( m_hFile,		//handle<br />
	    (DWORD)2048,	//input buffer, in bytes<br />
	    (DWORD)2048);	//output buffer, in bytes<br />
<br />
	<br />
  //get the current control settings of the COM port<br />
  //--This function fails---<br />
  DCB dcb;<br />
  fSuccess = GetCommState(m_hFile,&dcb);<br />
<br />
  if (!fSuccess) <br />
  {<br />
    //--dError == 995<br />
    DWORD dError = GetLastError();<br />
<br />
    // Handle the error.<br />
    AfxMessageBox ("Error 3: Failed to Get the System Communication Settings.", MB_OK|MB_ICONEXCLAMATION );<br />
    return FALSE;<br />
  }<br />
.<br />
.<br />
.<br />
.<br />
}<br />

//this is a struct
   
	WNDCLASSEX windowClass = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, 
                      GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
                      (LPCWSTR)"Barry's D3D BaseClass", NULL };


	// Register the window class
	
	RegisterClassEx( &windowClass );

	// Create the application's window

	HWND hWnd = CreateWindow( (LPCWSTR)"Barry's D3D BaseClass", (LPCWSTR)"test", 
                              WS_OVERLAPPEDWINDOW, 100, 100, 300, 300,
                              GetDesktopWindow(), NULL, windowClass.hInstance, NULL );

	// Initialize Direct3D


    if( 1 )
    { 
        // Show the window
        ShowWindow( hWnd, SW_SHOWDEFAULT );
        UpdateWindow( hWnd );

		MSG mssg;

		PeekMessage( &mssg, NULL, 0, 0, PM_NOREMOVE);
		// run till completed
		while (mssg.message!=WM_QUIT) 
		{
			// is there a message to process?
			if (PeekMessage( &mssg, NULL, 0, 0, PM_REMOVE))
			{
				// dispatch the message
				TranslateMessage(&mssg);
				DispatchMessage(&mssg);
			} 
			else 
			{
	           	//No message to process?
				// Then do your game stuff here
    			 //Render();
     		}
		}

	}

    UnregisterClass( (LPCWSTR)"Barry's D3D BaseClass", windowClass.hInstance );