Createfile Error 2 Windows
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Windows Createfile Serial Port
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Windows Createfile Append
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join createfile windows ce the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a createfile error code 3 minute: Sign up CreateFile returns error INVALID_HANDLE_VALUE (for COM port), and GetLastError returns “can't find file specified” up vote 5 down vote favorite 2 I'm opening a port to communicate with a device and control the device, but the CreateFile() function https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).aspx returns INVALID_HANDLE_VALUE. GetLastError() returns 2 which means it can't find the specified file. My code is shown below: wsprintf( szPort, "COM%d", nPort ); m_hIDComDev = CreateFile(szPort, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); if (m_hIDComDev == INVALID_HANDLE_VALUE) { DWORD err=GetLastError(); } Why does this problem occur? c++ winapi serial-port share|improve this question edited Mar 5 '13 at 20:25 Roman R. 47.8k34177 asked Jan 31 '13 at 20:54 user1964417 93721017 Please show the code. –Jesse Good Jan 31 http://stackoverflow.com/questions/14634954/createfile-returns-error-invalid-handle-value-for-com-port-and-getlasterror-r '13 at 20:58 @JesseGood, I have modified my question. –user1964417 Jan 31 '13 at 21:01 1 I suspect HOWTO: Specify Serial Ports Larger than COM9 this is the problem. –Jesse Good Jan 31 '13 at 21:02 @JesseGood, thanks a lot! I find out that there is no COM2 port on my computer. So, what I can do now is to randomly change to a port that my computer has or I need to choose a specific one? –user1964417 Jan 31 '13 at 21:15 Well, wouldn't that depend on what you want to do? Open device manager to see a list of ports. –Jesse Good Jan 31 '13 at 21:30 add a comment| 2 Answers 2 active oldest votes up vote 5 down vote The problem is that you're not specifying the correct value for lpFileName for your serial port. You should be using this format: "\\\\.\\COM%d" Which will result in a string that looks like \\.\COM1, which is the correct format. share|improve this answer answered Jan 31 '13 at 21:02 Adam Maras 17.5k23978 add a comment| up vote 1 down vote I know it is an old question but for the sake of others looking for answer to this. Try using char *szPort = _T("COM1"); //Change port # to your unused existing port _T forces to keep szPort in ASCII share|improve this answer edited Nov 12 '14 at 9:42 Zac 1,8591628 answered Aug 20 '13 at 19:58
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About http://stackoverflow.com/questions/885742/createfile-error-in-windows7 Us Learn more about Stack Overflow the company Business Learn more about hiring http://stackoverflow.com/questions/14883547/windows-api-createfile-with-open-existing-set-returns-error-code-of-error-al developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up CreateFile error in Windows7 up vote error 2 0 down vote favorite I've noticed that if the path parameter to the CreateFile function targets \Windows\System32\ the call is failing with the following error code ERROR_PATH_NOT_FOUND. The file path is correct, I'm the owner of the folder, so the question is why is the call failing? Did MS add special policy forbidding the folder from being accessed? Sample code: TCHAR szFile[MAX_PATH]; PathCombine(szFile, g_szSystemDirectory, "settings.ini"); HANDLE error 2 in hFile = CreateFile(szFile, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL); if (hFile == INVALID_HANDLE_VALUE) { printf("INVALID FILE: %i", GetLastError()); return FALSE; } windows-7 createfile system32 share|improve this question edited May 20 '09 at 3:15 asked May 20 '09 at 1:09 arul 11.9k14273 add a comment| 4 Answers 4 active oldest votes up vote 2 down vote accepted Can we see some example code? Have you specified the drive, I.e. "C:\Windows\System32\" Are you trying to open a file inside system32? Does this occur on Windows 7 only? and Why do you need to modify anything inside system32 in the first place? Billy3 share|improve this answer answered May 20 '09 at 2:47 Billy ONeal 62.9k25206424 1) I'll add in a sec. 2) Yes. 3) Yes. 4) Yes, works fine under XP. 5) Need to load a config file. –arul May 20 '09 at 2:51 Why is the config file in system32? Shouldn't you be putting that in %appdata%? –Billy ONeal May 20 '09 at 2:54 Oh, and is this a 64 Bit OS? –Billy ONeal May 20 '09 at 2:55 2 WOW is redirecting calls not into system32, but into syswow64. See en.wikipedia.org/wiki/WOW64#Re
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Windows API - CreateFile() with OPEN_EXISTING set returns error code of ERROR_ALREADY_EXISTS (183) up vote 0 down vote favorite I am trying to open a named pipe using CreateFile(): g_hPipe = CreateFile(szPipeName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL); where szPipeName looks like \\\\.\\pipe\\service_name, and I am getting INVALID_HANDLE_VALUE returned. According to the MSDN, the OPEN_EXISTING flag only returns an error if the file doesn't exist, yet GetLastError() shows ERROR_ALREADY_EXISTS (183). I know the file exists, that's why I'm using OPEN_EXISTING... The MSDN suggests this only occurs when OPEN_ALWAYS or CREATE_ALWAYS are set. I call SetLastError(0) immediately before CreateFile() to make sure the GetLastError() result is referring to the CreateFile() function. I've searched quite a bit and haven't found anything to suggest why I am receiving this error. Any help is appreciated. c++ winapi named-pipes createfile share|improve this question edited Feb 14 '13 at 20:50 asked Feb 14 '13 at 20:35 jfinnis 313 Is it a duplex (read/write) pipe? –arx Feb 14 '13 at 20:43 Here's an example using named pipes, although it doesn't have an answer to your specific question: msdn.microsoft.com/en-us/library/windows/desktop/… –HerrJoebob Feb 14 '13 at 20:45 Yes, the server creates a duplex pipe. –jfinnis Feb 14 '13 at 20:47 Also, as is said many times, GetLastError() returning something does nto actua