MFC CString to char*

/// <summary>
/// CString  turn  char*
/// </summary>
/// <param name="str"> Input CString type </param>
/// <returns> Converted char* type </returns>
char* CStringToCharArray(CString str)
{
    
    int n;
    n = WideCharToMultiByte(CP_OEMCP, 0, str, -1, NULL, 0, 0, FALSE);  // Wide byte to multi byte 
    char* SendInt = new char[n];
    memset(SendInt, 0, n * sizeof(char));    // initialization pSend
    WideCharToMultiByte(CP_OEMCP, 0, str.GetBuffer(0), n, SendInt, n, 0, FALSE);
    str.ReleaseBuffer();    // Release cache 
    return SendInt;
}