MFC: Create Directory

Original link: How to check if Directory already Exists in MFC(VC++)?

 

MSDN Links:

CreateDirectory function

GetFileAttributes function

GetLastError function

System Error Codes

 

Example:

VC++  MFC DLL project

#include "stdafx.h"

#include <windows.h>

#include <Shellapi.h>



    // To check if a file/folder exists:



    // Method 1: GetFileAttributes

    // Description: 

    // Retrieves file system attributes for a specified file or directory.

    // Return value:

    //   a) If the function succeeds, the return value contains the attributes of the specified file or directory. For a list of attribute values and their descriptions, see File Attribute Constants.

    //   b) If the function fails, the return value is INVALID_FILE_ATTRIBUTES. To get extended error information, call GetLastError.

    if (GetFileAttributes(szDirPath) == INVALID_FILE_ATTRIBUTES) {

        CreateDirectory(szDirPath,NULL);

    }



    // Method 2: CreateDirectory

    // Description:

    // Creates a new directory

    // Return value:

    //   a) If the function succeeds, the return value is nonzero.

    //   b) If the function fails, the return value is zero. To get extended error information, call GetLastError. 

    if(!CreateDirectory(szDirPath,NULL))

    { 

        if (GetLastError() == ERROR_ALREADY_EXISTS) {

            // directory already exists

        } else {

            // creation failed due to some other reasons

        }

    }