{"id":1962,"date":"2020-07-02T12:41:52","date_gmt":"2020-07-02T07:11:52","guid":{"rendered":"https:\/\/www.calltutors.com\/blog\/?p=1962"},"modified":"2024-01-20T03:13:45","modified_gmt":"2024-01-20T07:13:45","slug":"what-is-hook","status":"publish","type":"post","link":"https:\/\/www.calltutors.com\/blog\/what-is-hook\/","title":{"rendered":"What is Hook in Programming And Why is it Important"},"content":{"rendered":"\n<p>Since Hooking has become a crucial concept in computer programming, therefore it has become a need of an hour to know what is hook and how it is essential for the programmers.&nbsp;<\/p>\n\n\n\n<p>Programmers are well familiar with this term, but if you are not a programmer and want to know what exactly hook is in programming, you are on the right spot.<\/p>\n\n\n\n<p>A hook is basically a place where you can insert coding to monitor a program&#8217;s functioning. This blog will help to understand hook and the other aspects in relation to hook in programming.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/www.calltutors.com\/AskAssignment\"><img decoding=\"async\" width=\"720\" height=\"270\" src=\"https:\/\/www.calltutors.com\/blog\/wp-content\/uploads\/2021\/09\/Best-Assignment-Help-Services-1.gif\" alt=\"Best Assignment Help Services\" class=\"wp-image-5322\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-is-a-hook\"><\/span><strong>What Is A Hook?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e233651dfe7\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e233651dfe7\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#what-is-a-hook\" >What Is A Hook?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#meaning-of-hook\" >Meaning Of Hook<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#example\" >Example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#why-is-it-important-to-know-what-is-hook\" >Why Is It Important To Know What Is Hook?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#what-is-hook-as-design-patterns\" >What Is Hook As Design Patterns?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#two-concepts-of-hooking\" >Two Concepts Of Hooking<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#1-iat-hooking-%e2%80%93-import-address-table-hooking\" >1.&nbsp; IAT HOOKING \u2013 Import Address Table hooking<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#2-inline-hooking\" >2.&nbsp; Inline Hooking<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#types-of-hooks\" >Types Of Hooks<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#1-virtual-method-table-hooking\" >1.&nbsp; Virtual Method Table Hooking<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#2-hooking-api\" >2.&nbsp; Hooking API<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#conclusion\" >Conclusion<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#frequently-asked-questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#what-is-the-main-purpose-of-hooking-in-programming\" >What Is The Main Purpose Of Hooking In Programming?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#what-is-the-method-of-inserting-hooks\" >What Is The Method Of Inserting Hooks?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.calltutors.com\/blog\/what-is-hook\/#what-is-hooking-in-cybersecurity\" >What Is Hooking In Cybersecurity?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<p>A Hook is a place or an interface present in packaged code that allows you to insert a customized program in programming.<\/p>\n\n\n\n<p>For example, you as a programmer want to provide a code that analyzes the frequency of a particular logic path within the program.<\/p>\n\n\n\n<p>Hooks are given for a prescribed purpose and are documented accordingly for the programmer. So these are to be used appropriately so that it can be used to perform the core of the function of Hooking; otherwise, it may lead to the destruction of the program. This is also a reason to carefully understand what is hook<strong>.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"meaning-of-hook\"><\/span><strong>Meaning Of Hook<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>In computer programming, programmers use a technique to modify or extend applications, operating systems, or other software components through intercepting calls or messages or events occurring within such components. Code that is used to perform intercepting such call messages or events is called a hook.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"example\"><\/span><strong>Example<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Browsers also use the hook function to make it simple for antivirus software in order to scan downloads. The interesting fact about the same is that when it starts a download, it says, &#8216;hey anyone listening, I&#8217;m starting a download!&#8217; and thereby other programs can also react to the same. You won&#8217;t be able to understand this procedure unless you know what is hook.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"why-is-it-important-to-know-what-is-hook\"><\/span><strong>Why Is It Important To Know What Is Hook?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/IMhKDX3t668t5t6z5xCj2604UzaQw18WJGKN8T5037KQa7AMswr7O34V6q6aOklc0okmEDTfBQsCb77e2wkRJg2SDx2M4R2KhPzdxZxvv13ERjRPEgwV7wUk2gYE_f089e4dlYvD=s0\" alt=\"\" style=\"width:330px;height:466px\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>1. Hooking allows a programmer to change the behavior of a program. Code in a program gives this feature to modify the program&#8217;s original behavior without changing the codes of the corresponding class. And all this is done by hook function. Thereby the need to understand hooks arises.<\/p>\n\n\n\n<p>2. Secondly, the hook function helps to add new functionalities to applications.<\/p>\n\n\n\n<p>3. It ensures the inter-communication between the other processes and messages of the system.<\/p>\n\n\n\n<p>4. The major aspect of knowing about hooks is that it may degrade the performance of a program due to an increase in processing load. And it is required to perform these functions for each message. Thus, it should be cautiously handled, and it must be installed when it is much needed and thereby can remove it as soon as possible.<\/p>\n\n\n\n<p>5. If we say in common parlance what is hook, then it is a kind of function which allows a programmer to modify or extend the behavior of the existing system or program. If we can extend any chrome or browser, then it is because of hooks in such chrome or browser.<\/p>\n\n\n\n<p>In a nutshell, if we say <strong>what is hook, <\/strong>&nbsp;it is like you fix your program so that if any particular thing happens in such a program, it will inform you. That is why some developers put this function intentionally.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-is-hook-as-design-patterns\"><\/span><strong>What Is Hook As Design Patterns?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>One interesting fact about the hook is that now all the design patterns typify semantics for hooks. Whereby semantics is generally expressed in the hooks with the name of &#8220;in the command&#8221;. The main function of Hook as Design patterns is to implement subsystems of hotspots.<\/p>\n\n\n\n<p>If you are a video games lover, you should also know what is hook<strong> <\/strong>as hooks in action also support video games.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"two-concepts-of-hooking\"><\/span><strong>Two Concepts Of Hooking<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>It is imperative to know the concept of IAT hooking and Inline Hooking to understand what is hook as it performs the function of hooking in the program.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1-iat-hooking-%e2%80%93-import-address-table-hooking\"><\/span><strong>1.&nbsp; IAT HOOKING \u2013 Import Address Table hooking<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>In programming, the operating system is responsible for loading executable files into memory on double-clicking or otherwise. Here, loading means to read and interpret the bytes of the program on disk. Loading also finds out which part of the program will go where and how the file will be saved in the program.<\/p>\n\n\n\n<p>A running program is basically a simple set of instructions and data which are loaded in the memory of the program, and it consists of 1 thread executing instructions.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2-inline-hooking\"><\/span><strong>2.&nbsp; Inline Hooking<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Inline Hooking and IAT hooking are almost similar, and the basic difference between the two is that inline Hooking writes the malicious functionality into a legitimate DLL instead of misguiding a victim file.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"types-of-hooks\"><\/span><strong>Types Of Hooks<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>&nbsp;To know more about hooks in programming we should look into its types. Following are the types of hooks-<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1-virtual-method-table-hooking\"><\/span><strong>1.&nbsp; Virtual Method Table Hooking<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>The virtual method is similar to the static method. But we can modify virtual methods comparatively as the compiler does not know the address of a particular virtual function when we put it in the code.&nbsp;<\/p>\n\n\n\n<p>That is why the compiler builds a Virtual method table to provide a method to search the function address meanwhile. VMT uses more memory and also runs faster.<\/p>\n\n\n\n<p>Conclusively, VMT has pointers with memory addresses for interface functioning. It must be performed to replace the original memory address with the address of the valid hook function. Thereby, Hooking performs the vital function in a program.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2-hooking-api\"><\/span><strong>2.&nbsp; Hooking API<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>API stands for an application programming interface. This method is used to reprogram the functioning of the operating system, as we can change the parameters of commands by modifying the action that was performed originally. It also specifies the significance of the hook<strong>.<\/strong><\/p>\n\n\n\n<p><strong>Quick Links<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.calltutors.com\/blog\/is-php-programming-language\/\">Is PHP Programming Language? What Does Experts Think?<\/a><\/li>\n\n\n\n<li>Which Programming Language To Learn For The Beginners<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Hook has emerged as an important tool for programmers as they can modify and extend the code of the program or system. Hooking is a technique to change the behavior of the operating system or of other Softwares.&nbsp;<\/p>\n\n\n\n<p>Thus, it helps them to monitor the functioning of a program accordingly, for example, debugging. After understanding the concept and significance of hook in programming. We have learned how important it is to know what is hook in today&#8217;s time.<\/p>\n\n\n\n<p>And if you need any&nbsp;<a href=\"https:\/\/www.calltutors.com\/Articles\/Computer-Science-Assignment-Help\">Computer Science Assignment Help<\/a> then you can contact us anytime. We are 24\u00d77 available for your help.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"frequently-asked-questions\"><\/span><strong>Frequently Asked Questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-is-the-main-purpose-of-hooking-in-programming\"><\/span><strong>What Is The Main Purpose Of Hooking In Programming?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>In programming, the term hooking covers a range of methods used to adjust or augment an operating system&#8217;s behavior, apps, or other software parts by intercepting function calls or events or messages passed between software segments.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-is-the-method-of-inserting-hooks\"><\/span><strong>What Is The Method Of Inserting Hooks?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Generally, hooks are inserted when the software is already being run, but Hooking is inserted before the app starts. There are two types of Hooking, one is Source modification and the other is Runtime modification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-is-hooking-in-cybersecurity\"><\/span><strong>What Is Hooking In Cybersecurity?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Code hooking is an extremely intrusive coding activity where primarily OS function calls are intercepted by a program to augment or alter their behavior. Antivirus does this all-time when they find a piece of malware or when some modified routine is behaving badly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Since Hooking has become a crucial concept in computer programming, therefore it has become a need of an hour to know what is hook and how it is essential for the programmers.&nbsp; Programmers are well familiar with this term, but if you are not a programmer and want to know what exactly hook is in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1967,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[480],"tags":[349],"class_list":["post-1962","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming-posts","tag-programming"],"_links":{"self":[{"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/posts\/1962","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/comments?post=1962"}],"version-history":[{"count":1,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/posts\/1962\/revisions"}],"predecessor-version":[{"id":26684,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/posts\/1962\/revisions\/26684"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/media\/1967"}],"wp:attachment":[{"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/media?parent=1962"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/categories?post=1962"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.calltutors.com\/blog\/wp-json\/wp\/v2\/tags?post=1962"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}