The mfc file manipulates the method of creating a file for the CFile class

mfc file action class CFile

Several constructors of the CFile class

CFile();// A constructor with no arguments. 
CFile(int hFile);// Constructor with a file handle argument. 
CFile(
LPCTSTR lpszFileName,// The path to the file to open 
UINT nOpenFlage // Sharing and access mode when opening a file 
);// Constructor with file path and open mode 

In addition to opening the file with the constructor, you can open it with the member function Open of the CFile class

The OPen function prototype

virtual BOOL Open(
LPCTSTR lpszFilename,// The path to open the file can be either absolute or relative. 
UINT nOpenFlags, // Sharing and access mode when opening a file. 
CFileException *pError=NULL// Open the exception capture variable for the file 
 ) ;

The arguments to CFile constructor and CFile member function Open can be any combination of the following (using a bit or | combination) :

Create the file and open the example:

void CMFCApplication42Dlg::OnBnClickedButton1()
{
  // TODO:  Add control notification handler code here 
  CString filename = _T("C:\\Users\\Administrator\\Desktop\\test.txt"); // Define filename 
  TRY // Exception handling 
  {
    CFile f(filename, CFile::modeCreate | CFile::modeWrite);
  }
  CATCH (CFileException, e)// Abnormal trigger 
  {
    #ifdef _DEBUG // If it's in debug mode 
    afxDump << " Failed to open file " << e->m_cause << "\n";
    #endif

  }
  END_CATCH
}

conclusion

Above is the site to introduce mfc file operation CFile class to create the file method, I hope to help you, if you have any questions welcome to leave a message, this site will reply you in time!