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

        }

    }

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