Check file is open or not

[Davitor]

Hi All How can i check text file is open or not?

[Naveen]

By some other applications?

nave [OpenedFileFinder] [My Blog]

[Stuart Dootson]

Try and open it with CreateFile[^], specifying 0 (no sharing) for the dwShareMode parameter. If the file is already open, CreateFile will return INVALID_HANDLE_VALUE and GetLastError will return ERROR_SHARING_VIOLATION. The code below will fail, printing the value of ERROR_SHARING_VIOLATION if the file a.a is already open.

HANDLE f = CreateFile("a.a", GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
   if (f == INVALID_HANDLE_VALUE)
   {
      std::cout << GetLastError() << std::endl;
      return 0;
   }

[Divyang Mithaiwala]

You may find your answer over here[^].

---

Do not trust a computer... Always check what computer is doing regards, Divyang Mithaiwala Software Engineer

[_Flaviu]

I don't think that your sample is written in MFC ... but is good to see the solution way.