Re: MSComm Buffer

Ok, I surrender.
I'm reading your essay about Serial Port ( http://www.flounder.com/serial.htm
) but I've lost very quickly...

Just for test I created a new mfc project with a button.

In the file resources.h I've defined the messages (it's ok here?)
When I click on the button I execute this:

hCom = ::CreateFile( _T("\\\\.\\COM8"), // COM8, just for
test!
                    GENERIC_READ | GENERIC_WRITE, // desired access
                    0, // exclusive
                    NULL, // security
irrelevant
                    OPEN_EXISTING, // it has to be
there
                    FILE_FLAG_OVERLAPPED, // open
asynchronous
                    NULL);

Ok , the ports gets open.
I've created the SerialParameters class, and something about
SerialWriter:
class SerialParameters {
    public:
        SerialParameters() { hCom = NULL; notifyee = NULL; shutdown =
NULL; }
        SerialParameters(HANDLE h, CWnd * w, HANDLE sd) {
                      hCom = h; notifyee = w; shutdown = sd; }
        HANDLE hCom;
        CWnd * notifyee;
        HANDLE shutdown; //I understan what's hCom and imagine that
notifyee may point to m_pMainWnd, but what's shutdown???
};

class SerialWriter:public CWinThread
{
    public:
        SerialParameters* params;

    protected:
        HANDLE WriteEvent;
        void OnSendData( WPARAM, LPARAM );
};

Now I'm completly lost...
You say: "So you create the SerialParameters structure with the
appropriate arguments."
I guess once the hCom is created:
 SerialParameters* params = new SerialParameters( hCom,
m_pMainWnd, ????? );

Then say:
"To create the thread, do /* SerialWriter * */ writer = (SerialWriter
*)...."
This line throws me an error:
            error C2039: 'classSerialWriter' : is not a member of
'SerialWriter'