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GeneralRe: How To Connect Serial Port in MFC? Pin
David Crow28-Apr-08 10:40
David Crow28-Apr-08 10:40 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200928-Apr-08 10:55
MrFloyd200928-Apr-08 10:55 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200928-Apr-08 11:00
MrFloyd200928-Apr-08 11:00 
GeneralRe: How To Connect Serial Port in MFC? Pin
David Crow28-Apr-08 11:06
David Crow28-Apr-08 11:06 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200928-Apr-08 11:40
MrFloyd200928-Apr-08 11:40 
GeneralRe: How To Connect Serial Port in MFC? Pin
Randor 28-Apr-08 12:42
professional Randor 28-Apr-08 12:42 
GeneralRe: How To Connect Serial Port in MFC? Pin
CPallini28-Apr-08 21:13
mveCPallini28-Apr-08 21:13 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200928-Apr-08 23:11
MrFloyd200928-Apr-08 23:11 
Hi,
MSDN tells us this:

--COM ports
--The CreateFile function can create a handle to a COM port. By setting the dwCreationDisposition
--parameter to OPEN_EXISTING, read-only, write-only, or read/write access can be specified

But I did not successed to open port. If I open the hyper terminal program only one time, and then i closed hyper terminal ; this code works and serial_handle is not equal invalid.. :

if (serial_handle!=INVALID_HANDLE_VALUE)
CloseHandle(serial_handle);

serial_handle = INVALID_HANDLE_VALUE;

serial_handle = CreateFile("COM1",GENERIC_READ | GENERIC_WRITE,
0, NULL, OPEN_EXISTING ,NULL,NULL);

if ( serial_handle == INVALID_HANDLE_VALUE )
{
GetLastError(); // it returns 0

I couldn't understand this situation? Please tell me where am I wrong?
QuestionRe: How To Connect Serial Port in MFC? Pin
CPallini28-Apr-08 23:45
mveCPallini28-Apr-08 23:45 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200929-Apr-08 0:11
MrFloyd200929-Apr-08 0:11 
GeneralRe: How To Connect Serial Port in MFC? Pin
CPallini29-Apr-08 0:23
mveCPallini29-Apr-08 0:23 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200929-Apr-08 0:48
MrFloyd200929-Apr-08 0:48 
QuestionRe: How To Connect Serial Port in MFC? Pin
CPallini29-Apr-08 0:54
mveCPallini29-Apr-08 0:54 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200929-Apr-08 1:24
MrFloyd200929-Apr-08 1:24 
GeneralRe: How To Connect Serial Port in MFC? Pin
CPallini29-Apr-08 1:33
mveCPallini29-Apr-08 1:33 
GeneralRe: How To Connect Serial Port in MFC? Pin
MrFloyd200929-Apr-08 1:56
MrFloyd200929-Apr-08 1:56 
GeneralRe: How To Connect Serial Port in MFC? Pin
CPallini29-Apr-08 1:58
mveCPallini29-Apr-08 1:58 
AnswerRe: How To Connect Serial Port in MFC? Pin
Hamid_RT29-Apr-08 4:09
Hamid_RT29-Apr-08 4:09 
GeneralRetrieve Win32 Process Memory Map Pin
edfgreen28-Apr-08 8:19
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Saurabh.Garg28-Apr-08 14:58
Saurabh.Garg28-Apr-08 14:58 
GeneralRe: Retrieve Win32 Process Memory Map Pin
Stephen Hewitt28-Apr-08 15:18
Stephen Hewitt28-Apr-08 15:18 
GeneralRe: Retrieve Win32 Process Memory Map Pin
edfgreen28-Apr-08 19:11
edfgreen28-Apr-08 19:11 
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dev_buzz28-Apr-08 6:59
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