MySQL: SUBSTRING_INDEX vs MID+INSTR (which is better)

Hello there.

SUBSTRING_INDEX vs MID+INSTR

I wanted to pull from domain name out of an email (or just remove the username part of an email).

There are two simple functions (and even more...) to do it:

1] SUBSTRING_INDEX('testuser@domain.com','@',-1)

use built in function SUBSTRING_INDEX to explode the string by '@' and get the last element.

 

2] MID('testuser@domain.com', INSTR('testuser@domain.com','@')+1, 999)

find '@' position using INSTR and get all string from that position until the end of string by MID function. 

 

But which one of them have better performance?

Using BENCHMARK function for Measuring the Speed of Expressions and Functions.

1] SELECT  BENCHMARK(100000000, SUBSTRING_INDEX('testuser@domain.com','@',-1))

/* Affected rows: 0  Found rows: 1  Warnings: 0  Duration for 1 query: 12.625 sec. */

2] SELECT  BENCHMARK(100000000, MID('testuser@domain.com', INSTR('testuser@domain.com','@')+1, 999))

/* Affected rows: 0  Found rows: 1  Warnings: 0  Duration for 1 query: 19.157 sec. */

BENCHMARK function results may vary between different devices, but on the same device can give quite clear results.

 

Summary:

SUBSTRING_INDEX won and have better results than MID + INSTR

JQuery serialize on form is EMPTY (ajax/post/get)

 Hi All,

I had several times a problem, that the collected data by jQuery API's serialize() or serializeArray() was empty, although the inputs were not empty.

Follow these checkups to by pass the problem.

1] when the input don't name attribute the result will be empty.

<form id="form1">
        <input type="text" value="test value">
        <button>submit</button>
</form>

//$('#form1').serialize()  ==> "" (empty)

SOLUTION:

<form id="form1">
        <input type="text" value="test value" value="ANYNAME">
        <button>submit</button>
</form>

//$('#form1').serialize()  ==> "ANYNAME=test+value" 

using FontAwesome in PHP FPDF

Hi All,

I found it impossible to use FontAwesome 4.7.0 Free version, inside FPDF PHP engine.

When trying to upload the FontAwesome.4.7.full.otf into FPDF's Font File Generation, I'm getting an error:

Error: OpenType fonts based on PostScript outlines are not supported

So my solution, 

to re-build the FontAwesome font 4.7 free version (under same license!),

with mapping of regular characters to icons HEX CODES: 0x21 to 0xFF. 

So for example, 

character code 0x21 is now mapped to * (FontAwesome's asterisk)

And then, just use it inside PHP FPDF as follows:

// Import and prepare font for usage by engine:

$pdf->AddFont('FontAwesome47-P1','','FontAwesome47-P1.php');

...

// print FontAwesome's asterisk

$pdf->SetFont('FontAwesome47-P1' '', 14);

$pdf->Text($x, $y, chr(0x21));

Note:

Remember to upload the files FontAwesome47-P1.php + FontAwesome47-P1.z,
that generated on FPDF's Font File Generation to the FPDF's font folder.

Characters code MAP of new fonts exists as preview when opening the google-drive links below.

View MAP + DOWNLOAD: FontAwesome47-P1.otf (google drive)

View MAP + DOWNLOAD: FontAwesome47-P2.otf (google drive)

View MAP + DOWNLOAD: FontAwesome47-P3.otf (google drive)

View MAP + DOWNLOAD: FontAwesome47-P4.otf (google drive)

PHP+Z Files ready-to-use for PHP FPDF (with ISO-8859-1 encoding):

FontAwesome47-P1-4 (php+z files) DOWNLOAD (google drive)

Best regards!

Please write comments...

MySQL | join/combine 2 SMALLINT/TINYINT into 1 INT

Hi All.

Today we will try to combine two MYSQL small integer values into one integer value.
Obviously, there is limit for the size of integer.
We will discuss only UNSIGNED integer column types (non negative values).

2 Solutions are suggested below:
Solution-1: concatenate base-9 value of each number with '9' separator.
Solution-2: concatenate the original values with padding (left) zeros.
[Note: if the values allowed to be NULL, solution-2 is not supported!].

# LIMITS #

First, lets learn about the range limits of each data-type:

Datatype	Type	UNSIGNED Range	Max value (base9)
INT	A normal-size integer	0 to 4294967295	-
SMALLINT	A small integer	0 to 65535	CONV(65535, 10, 9) = 108806
TINYINT	A very small integer	0 to 255	CONV(255, 10, 9) = 313

# SOLUTION-1 (Support NULL values) #

Combine and merge two small integers,
into 1 integer by converting each number to base-9 integer,
and then concatenate with the digit '9' as separator.

Two SMALLINTs cannot be saved inside INT value:
1088069108806 > 4294967295.
But combining SMALLINT with TINYINT is possible (and aswell two TINYINT).

MYSQL CODE:

############ TABLE DEFINITION:
CREATE TABLE `table_test` (
`id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
`sint1` SMALLINT(5) UNSIGNED NULL DEFAULT NULL,
`tint2` TINYINT(3) UNSIGNED NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE);

############ SELECT:
SELECT  T.*, 
        CONV(SUBSTRING_INDEX(combined,'9',1), 9,10) as _sint1, 
        CONV(SUBSTRING_INDEX(combined,'9',-1),9,10) as _tint2
FROM (
	SELECT 	id, sint1, tint2, 
                CONCAT( IFNULL(CONV(sint1, 10, 9),''), 
                        '9', 
                        IFNULL(CONV(tint2, 10, 9),'')
                ) AS combined
	FROM table_test
) AS T

            

And output will be:

id	sint1	tint2	>combined	>_sint1	>_tint2
1	NULL	NULL	9	NULL	NULL
2	1234	NULL	16219	1234	NULL
3	NULL	255	9313	NULL	255
4	3123	38	4250942	3123	38
5	3410	243	46089300	3410	243
6	2685	207	36139250	2685	207
7	1327	224	17349268	1327	224
8	2047	102	27249123	2047	102
9	2953	189	40419230	2953	189
10	3686	117	50459140	3686	117
11	4455	18	6100920	4455	18
12	2482	66	3357973	2482	66
13	3072	74	4183982	3072	74
14	2036	42	2712946	2036	42
15	2047	139	27249164	2047	139
16	1573	236	21379282	1573	236
17	2464	173	33379212	2464	173
18	3656	155	50129182	3656	155
19	3305	120	44729143	3305	120
20	5894	121	80689144	5894	121

# SOLUTION-2 (NULLS not supported) #

Here we just merge the original values with LEFT-PADDING of zeros.

MYSQL CODE:

############ TABLE DEFINITION:
CREATE TABLE `table_test` (
`id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
`sint1` SMALLINT(5) UNSIGNED NULL DEFAULT NULL,
`tint2` TINYINT(3) UNSIGNED NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE);

############ SELECT:
SELECT  T.*, 
        SUBSTR(combined,1,LENGTH(combined)-3)+0 AS _sint1,
        RIGHT(combined,3)+0 AS _tint2
FROM (
	SELECT 	id, sint1, tint2, 
                CONCAT(sint1, LPAD(tint2,3,0)) AS combined
	FROM table_test
) AS T
            

And output will be:

id	sint1	tint2	>combined	>_sint1	>_tint2
4	3123	38	3123038	3123	38
5	3410	243	3410243	3410	243
6	2685	207	2685207	2685	207
7	1327	224	1327224	1327	224
8	2047	102	2047102	2047	102
9	2953	189	2953189	2953	189
10	3686	117	3686117	3686	117
11	4455	18	4455018	4455	18
12	2482	66	2482066	2482	66
13	3072	74	3072074	3072	74
14	2036	42	2036042	2036	42
15	2047	139	2047139	2047	139
16	1573	236	1573236	1573	236
17	2464	173	2464173	2464	173
18	3656	155	3656155	3656	155
19	3305	120	3305120	3305	120
20	5894	121	5894121	5894	121

This solution can work with two SMALLINT,
if one of them limited up to 42949,
and it will be the left operand.

php merge dateranges code algorithm

Here is a code for merging date-ranges in array. The method gives new array, with the maximum mergining between the date-ranges, meaning if there is a date-range that already exists with-in other, it can just skip, so just if two or more dates can be combined into one big date-range - it will be made :) . 

 

-------------------------------Example #1:

  array 
  0 => 's' => '2020-01-06' 'e' => '2020-01-10'
  1 => 's' => '2020-01-07' 'e' => '2020-01-12'
  2 => 's' => '2020-01-13' 'e' => '2020-01-16'
  3 => 's' => '2020-01-22' 'e' => '2020-01-24'

RESULT:
array 
  0 => 's' => '2020-01-06' 'e' => '2020-01-16'
  1 => 's' => '2020-01-22' 'e' => '2020-01-24'

 

-------------------------------Example #2:

array (size=8)
  0 => 's' => '2020-01-01' 'e' => '2020-01-01'
  1 => 's' => '2020-01-03' 'e' => '2020-01-03'
  2 => 's' => '2020-01-09' 'e' => '2020-01-10'
  3 => 's' => '2020-01-11' 'e' => '2020-01-22'
  4 => 's' => '2020-01-14' 'e' => '2020-02-02'
  5 => 's' => '2020-02-02' 'e' => '2020-02-03'
  6 => 's' => '2020-02-04' 'e' => '2020-02-04'
  7 => 's' => '2020-02-05' 'e' => '2020-02-07'

RESULT:
array (size=3)           
  0 => 's' => '2020-01-01' 'e' => '2020-01-01'
  1 => 's' => '2020-01-03' 'e' => '2020-01-03'
  2 => 's' => '2020-01-09' 'e' => '2020-02-07'

 

 

And here is the CODE:

$arrDateranges = array(
    array('s' => '2020-01-22', 'e' => '2020-01-24'),
    array('s' => '2020-01-06', 'e' => '2020-01-10'),
    array('s' => '2020-01-07', 'e' => '2020-01-12'),
    array('s' => '2020-01-13', 'e' => '2020-01-16'),
);
$arrMerged = mergeDateRanges($arrDateranges);
var_dump($arrDateranges);
var_dump($arrMerged);

//---------------------------------------------------------

// helper funciton to get NEXT date (or any modified date)
function getRelativeDate($p_sDate, $p_sModify, $p_sFormatIn = 'Y-m-d', $p_sFormatOut = 'Y-m-d') {
    $oDT = DateTime::createFromFormat($p_sFormatIn, $p_sDate);
    $oDT->modify($p_sModify);
    return $oDT->format($p_sFormatOut);
}

function mergeDateRanges($p_arrDateranges) {
    // sort by start date
    usort($p_arrDateranges, function($a1, $a2) {
        return $a1['s'] === $a2['s'] ? 0 : ($a1['s'] < $a2['s'] ? -1 : 1);
    });
    
    $arrMerged = array();
    $arrLastDR = null;
    foreach ($p_arrDateranges as $arrDR) {
        if ($arrLastDR === null) {
            $arrLastDR = $arrDR;
            continue;
        }
        //
        // NOTE: dateS is sorted thus $sDateS >= $arrLastDR['s']
        //
        if ($arrDR['e'] <= $arrLastDR['e']) {
            continue; // already in the range.
        }
        // --- [e] > lastDR[e] ---
        $sLastDateE_1 = getRelativeDate($arrLastDR['e'], '+1 day');
        if ($arrDR['s'] <= $sLastDateE_1) { // lapping date-range until day+1
            $arrLastDR['e'] = $arrDR['e'];
            continue;
        }

        // there is gap, so need to create new date-range
        array_push($arrMerged, $arrLastDR);
        $arrLastDR = $arrDR;
    }

    if ($arrLastDR === null) {
        array_push($arrMerged, $arrLastDR);
    }
    return $arrMerged;
}

Skype | stuck on loading screen [SOLVED] [SOLUTION]

Hello!

This thread is about a sign-in problem of SKYPE version 8.56.0.103,

where the application is stuck on loading screen.

here:

Here is how I've solved the problem!

I'm working at the moment with windows7,
but i assume that the solution will work for any windows version.

Step1:
make sure you have your Skype username/password saved,
as you will need to re-login later on.

Step2:
Make sure Skype on your desktop is closed. (if not - close/quit)

Step3:
Open your appdata Local folder:
C:\Users\YourUserNameHere\AppData\Roaming

alternative for opening the folder:
- search on windows start search for %appdata%
- click on Roaming 

  

Step4:
On the Roaming folder, Enter Microsoft folder,

Find Skype for Desktop folder, and rename it to "___skype"

(just to have backup)

Step5:

Just restart your skype and everything works :)

Let me know. 

:)

:)

c# | WebBrowser control - programmatically select item on html `select`

Hi There,

As many times, we need to interact with the C# (.Net) Webbrowser Control, 

it is useful to be able to interact and programmatically change the selected item 

on an HTML select control.

I don't know, why it is hard to find this easy solution, but the code is as follow:

HtmlElementCollection col = webBrowser1.Document.GetElementsByTagName("select") 
foreach (HtmlElement heItem in col) 
{ 
  if (heItem.GetAttribute("className").Contains("exampleClassName") == true) 
  { 
    heItem.SetAttribute("selectedIndex", "3"); // select value at #3
    break; // incase of needed... 
  } 
}  

And finally, just easy as u code...


If you need change by value and not by index,
I assume you can check the values of the select control (sometimes called: dropdown),
and once you find the correct index of the desired value,
use the code above.



MDB-BLOG :)

List of country flags (png) by ISO3

As I needed a list of country flag images named with ISO3, and couldn't find,

I uploaded my version free (see license on bottom).

Above there are two ZIP containing country flags images (PNG format)

sizes of 64x64  and  128x128 

of the ~250 countries

as the file name is ISO3 standard

and not two letter (ISO 3166-2) or full name as most flags out there...

Download flags_iso3_128x128.rar

http://www.megafileupload.com/gdW6/flags_iso3_128x128.rar

https://www.sendspace.com/file/5ht6yg

Example:

Download flags_iso3_64x64.rar

http://www.megafileupload.com/kq53/flags_iso3_64x64.rar

https://www.sendspace.com/file/bimuu8

Example:

license and images are all taken from:

https://github.com/stefangabos/world_countries

Free Javascript Obfuscator Online

Protects JavaScript code from stealing/reading and shrinks its size.

Free Javascript Obfuscator is a professional tool for obfuscation of javascript. It Converts JavaScript source code into scrambled and completely unreadable form, preventing it from analyzing and theft.
Visit: http://freejsobfuscator.com/

u can choose if to process by your will: parameters / functions / strings / new lines / indentations and it is 100% free!

How to install php imap extension on Centos (or any)

The php package (extension) for IMAP is usually:

php-imap

Sometimes, for example on amazon ec2, when installing PHP ver. 5.5 or 5.6,

In order to install this (or any other) PHP extension,

that not come with the default PHP,

You should installed the one related to your PHP version.

For example,

one of my servers have PHP 5.6 installed on it,

but when running 

 yum install php-imap 

which gives:

Error: php56-imap conflicts with php-imap-5.3.29-1.8.amzn1.x86_64
Error: php56-common conflicts with php-common-5.3.29-1.8.amzn1.x86_64
Error: php55-common conflicts with php-common-5.3.29-1.8.amzn1.x86_64
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest 

so instead, check first which version currently installed:

yum list installed | grep php

 which gives:

php56.x86_64                          5.6.14-1.119.amzn1           @amzn-updates
php56-cli.x86_64                      5.6.14-1.119.amzn1           @amzn-updates
php56-common.x86_64                   5.6.14-1.119.amzn1           @amzn-updates
php56-imap.x86_64                     5.6.14-1.119.amzn1           @amzn-updates
php56-jsonc.x86_64                    1.3.6-1.19.amzn1             @amzn-main
php56-mbstring.x86_64                 5.6.14-1.119.amzn1           @amzn-updates
php56-mysqlnd.x86_64                  5.6.14-1.119.amzn1           @amzn-updates
php56-pdo.x86_64                      5.6.14-1.119.amzn1           @amzn-updates
php56-process.x86_64                  5.6.14-1.119.amzn1           @amzn-updates
php56-xml.x86_64                      5.6.14-1.119.amzn1           @amzn-updates 

 

Which means that your PHP version is 5.6 (you can also run php -v)

php -v

 which gives:

PHP 5.6.14 (cli) (built: Oct 16 2015 22:58:32)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies

All needed now is to install the correct version.

If you install php55-imap (or any other package) it won't work!

Some have several PHP versions installed.

command:

 

yum install php56-imap

 

don't forget to restart your apache after that.

service httpd restart

and done... :)

Hope it helps.

PHP | XML to Html Table elment convertion

In this thread,
I will show generic & universal function that
gets XML string,
convert it,
and display it as an HTML table.
(you can add any css style to design your table later on of course)


The following code is using XML example from http://www.w3schools.com/xml/simple.xml.
The XML looks like that:

<breakfast_menu>
  <food>
    <name>Belgian Waffles</name>
    <price>$5.95</price>
    <description>Two of our famous...</description>
    <calories>650</calories>
  </food>
  <food>
    <name>Strawberry Belgian Waffles</name>
    <price>$7.95</price>
    <description>Light Belgian waffles...</description>
    <calories>900</calories>
  </food>
  <food>
    <name>Berry-Berry Belgian Waffles</name>
    <price>$8.95</price>
    <description>Light Belgian....</description>
    <calories>900</calories>
  </food>
  <food>
    <name>French Toast</name>
    <price>$4.50</price>
    <description>Thick slices made....</description>
    <calories>600</calories>
  </food>
  <food>
    <name>Homestyle Breakfast</name>
    <price>$6.95</price>
    <description>Two eggs, bacon...</description>
    <calories>950</calories>
  </food>
</breakfast_menu>

The function xmlToHtmlTable 

gets a SimpleXMLElement parameter which points to main parent for which will print all his children,
and returns html table representing the XML as string.

The Code:

 <?php  
   
 // get XML remotely / locally / or / just set it as string '<root>...</root>'  
 $sXml = file_get_contents('http://www.w3schools.com/xml/simple.xml');  
   
 // parse XML  
 $oXML = simplexml_load_string($sXml);  
 if (!$oXML) {  
      die('xml format not valid or simplexml module missing.');  
 }  
   
 // assuming running the root  
 $oXmlRoot = $oXML; // or can be [$oXML->food]  
   
 //echo '<pre>'; print_r( $oXmlRoot ); echo '</pre>';  
 echo xmlToHtmlTable($oXmlRoot);  
   
   
 function xmlToHtmlTable($p_oXmlRoot) {  
      $bIsHeaderProceessed = false;  
        
      $sTHead = '';  
      $sTBody = '';       
      foreach ($p_oXmlRoot as $oNode) {  
           $sTBody .= '<tr>';  
           foreach ($oNode as $sName => $oValue){  
                if (!$bIsHeaderProceessed) {  
                     $sTHead .= "<th>{$sName}</th>";  
                }  
                $sValue = (string)$oValue;  
                $sTBody .= "<td>{$sValue}</td>";                 
           }  
           $bIsHeaderProceessed = true;  
           $sTBody .= '</tr>';  
      }  
        
      $sHTML = "<table border=1>  
                     <thead><tr>{$sTHead}</tr></thead>  
                     <tbody>{$sTBody}</tbody>  
                </table>";  
      return $sHTML;  
 }  

This will output:

 

Hope it helps!

MDB BLOG!




 

MySQL | find median (Nth element) without join!

This is my suggestion to find on mysql select command

the Median (Nth element) without joining the table to itself (or to new custom one).

My method, uses string manipulation, 

so I'm not sure it is good for big tables.

(I tested it with medium size tables on Mysql 5.5.28)

The advantage of this method, 

that it works also if we need to find the MEDIAN for each group in the select query.

the code is using: SUBSTRING_INDEX and GROUP_CONCAT methods.


Here is test code for test table:

DROP TABLE test.test_median
CREATE TABLE test.test_median AS
SELECT 'book' AS grp, 4 AS val UNION ALL
SELECT 'book', 7 UNION ALL
SELECT 'book', 2 UNION ALL
SELECT 'book', 2 UNION ALL
SELECT 'book', 9 UNION ALL
SELECT 'book', 8 UNION ALL
SELECT 'book', 3 UNION ALL

SELECT 'note', 11 UNION ALL

SELECT 'bike', 22 UNION ALL
SELECT 'bike', 26 

and the code for finding the median for each group:

SELECT grp,
         SUBSTRING_INDEX( SUBSTRING_INDEX( GROUP_CONCAT(val ORDER BY val), ',', COUNT(*)/2 ), ',', -1) as the_median,
         GROUP_CONCAT(val ORDER BY val) as all_vals_for_debug
FROM test.test_median
GROUP BY grp

The output:

grp	the_median	all_vals_for_debug
bike	22	22,26
book	4	2,2,3,4,7,8,9
note	11	11

Hope it helps you there...

php | destroy/delete all sessions

I recently searched for an option deleting all running/active sessions,

for changing some important logic on my server.

Important:

just restarting apache won't help!

because php handles php-sessions by itself.

now,

I wonder how to make it, without changing php code.

The solution, is to delete the PHP session files created by PHP engine.

Step #1 - find where PHP store php files

on php.ini there is configured session.save_path 

which points to the correct path.

by default, it configured to "" (empty), and it is:

• On Ubuntu or Debian machines: saved on /var/lib/php5
  
• On RHEL and CentOS systems: saved on /var/lib/php/session
• If you need to find it: print session_save_path() on your php file.    You may run from command line:  php -r 'echo session_save_path(), "\n";'

Step #2 - just delete the files

Execute the following bash script:

rm  -f   /var/lib/php/session/*

or
rm  -f   /var/lib/php5/sess*

(-f will force delete without prompting!!) 

And that's it...

Now when a user will execute web-request, 

his session will be considered empty, 

and will be re-generated (under the same session name)

NSIS | create CENTER aligned text control

I searched on the internet for CENTER LABEL on NSIS,

but didn't find.

I saw that the ${SS_CENTER} style, not working with ${NSD_CreateLabel}

So I build my own code, using the STATIC control.

nsDialogs::CreateControl STATIC ${WS_VISIBLE}|${WS_CHILD}|${SS_CENTER} 0 29 180 439 60 "WELCOME TEXT"
Pop $0
CreateFont $1 "Arial" 9
SendMessage $0 ${WM_SETFONT} $1 1
SetCtlColors $0 0x000000 '0xff0000'

Hope it help...

 

c# Winforms WebBrowser - Clear all cookies

Hello,

I recently search for a method to delete all cookies from the build in .NET WinForms WebBrowser control.

I didn't found any working solution for it, nor working example.

It being told to use InternetSetOption, but nothing found about it.

So, i will write here my solution for clearing and deleting all cookies.

My solution using InternetSetOption with the option flag: INTERNET_OPTION_SUPPRESS_BEHAVIOR, which described as:

A general purpose option that is used to suppress behaviors on a process-wide basis. The lpBuffer parameter of the function must be a pointer to a DWORD containing the specific behavior to suppress. This option cannot be queried with InternetQueryOption.

This option flag should be used together with INTERNET_SUPPRESS_COOKIE_PERSIST options, which means:

Suppresses the persistence of cookies, even if the server has specified them as persistent.

So the example code for it will be:

static void Main()
{
    SuppressWininetBehavior();

    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    Application.Run(new Form1());
}

[System.Runtime.InteropServices.DllImport("wininet.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto, SetLastError = true)]
public static extern bool InternetSetOption(int hInternet, int dwOption, IntPtr lpBuffer, int dwBufferLength);

private static unsafe void SuppressWininetBehavior()
{
    /* SOURCE: http://msdn.microsoft.com/en-us/library/windows/desktop/aa385328%28v=vs.85%29.aspx
        * INTERNET_OPTION_SUPPRESS_BEHAVIOR (81):
        *      A general purpose option that is used to suppress behaviors on a process-wide basis. 
        *      The lpBuffer parameter of the function must be a pointer to a DWORD containing the specific behavior to suppress. 
        *      This option cannot be queried with InternetQueryOption. 
        *      
        * INTERNET_SUPPRESS_COOKIE_PERSIST (3):
        *      Suppresses the persistence of cookies, even if the server has specified them as persistent.
        *      Version:  Requires Internet Explorer 8.0 or later.
        */

    int option = (int)3/* INTERNET_SUPPRESS_COOKIE_PERSIST*/;
    int* optionPtr = &option;

    bool success = InternetSetOption(0, 81/*INTERNET_OPTION_SUPPRESS_BEHAVIOR*/, new IntPtr(optionPtr), sizeof(int));
    if (!success)
    {
        MessageBox.Show("Something went wrong !>?");
    }
}

Please make sure your project is allows unsafe code. (under Properties => Build Tab)

This code is deleting the COOKIES per PROCESS on startup ONLY.
[tested on WIN-7 and working great]


Best Regards,
MDB-BLOG :)