DLL(dynamic link library)

hi guys..!!this ppt will give u brief explanation on dll files...hope it works for u u..:)all the very best..:)

1. 01 WELCOME,

2. 02 What is DLL file? Stands for Dynamic Link Library A dynamic link library (DLL) is a collection of small programs, which can be called upon when needed by the executable program (EXE) that is running. The DLL lets the executable communicate with a specific device such as a printer or may contain source code to do particular functions.

3. 03 An example would be if the program (exe) needs to get the free space of your hard drive, It can call the DLL file that contains the function with parameters and a call function. The DLL will then tell the executable the free space. This allows the executable to be smaller in size and not have to write the function that already exists.

4. 04 This allows any program the information about the free space, without having to write all the source code and it saves space on your hard drive as well. When a DLL is used in this fashion are also known as shared files

5. 05 The advantage of DLL files is that, because they do not get loaded into random access memory (RAM) together with the main program, space is saved in RAM. When and if a DLL file is called, then it is loaded. For example, you are editing a Microsoft Word document, the printer DLL file does not need to be loaded into RAM. If you decide to print the document, then the printer DLL file is loaded and a call is made to print.

6. 06 DLL Download Sites are Not Approved Sources for DLL FILES DLL files are created and distributed by companies that develop software. Sometimes that software company is Microsoft, sometimes it is not. Many companies create DLL files as part of their software packages. A stable, clean, and updated copy of any DLL file can only be guaranteed by the developer. Websites that allow individual DLL downloads are in all but the rarest cases  not approved  places for downloading DLLs.

7. 07 Installing a Single DLL File is Often a Bandage for a Larger Problem DLL files are only small parts of entire software programs. Often times, an error message that singles out an individual DLL file is only telling you part of the story. The particular error is often being generated only because it's the first problem the software is encountering, not because it's the single cause of the problem.

8. 08 When you download and replace a DLL file from a DLL download site, you're often only solving one small part of a larger problem. Usually, the solution to the larger problem is to reinstall the entire software package that the DLL originated from.

9. 09 Even if replacing a single DLL file fixes your immediate issue, additional problems tend to show up later, often as error messages notifying you of yet another missing DLL file. Save yourself a lot of time and energy and fix the problem right the first time.

10. 10 DLLs from DLL Download Sites are Often Outdated DLL download sites exist solely so you'll find them on a search engine and hopefully click on their advertisements. They are not true software support sites and have little if any incentive to keep their DLL files updated. However, the software company that actually developed the DLL file will always have the most up to date and functional file available.

11. 11 Software developers rarely have single DLL files available for download, so if a reinstall of their software program doesn't replace or repair the DLL file you're after, I recommend contacting the company and requesting a copy of the file.

12. 12 DLL Files from DLL Download Sites May be Infected with Viruses DLL Files from DLL Download Sites May be Infected with Viruses Since DLL download sites are not approved sources for DLL files and often have little if any contact information available, there is no guarantee that the DLL file you just downloaded is free from a virus infection.

13. 12 DLL Files from DLL Download Sites May be Infected with Viruses Assuming you have a good antivirus program, an infected DLL file might be virus free as you download it but there is certainly no guarantee of that. Take the safe route and simply avoid downloading DLL files from these DLL download sites.

14. 13 DLL Download Sites Could Host DLL Files That Could Compromise Your Computer's Security DLL files are like small, specialized programs that can be programmed to perform various actions automatically, even actions that open your computer up to hacking and other kinds of intrusions.

15. 13 How To Fix DLL Problems the Right Way Question: So if downloading a DLL file from a DLL repository is such a bad idea, how in the world do you fix a missing DLL problem? Answer: Determine the root cause of the problem by troubleshooting!

16. 14 As I mentioned above, a computer tends to report not the whole of a problem to you, but just the first issue it encounters. A computer doesn't continue to list problem after problem it finds, just the first one that makes it stop. In this case a missing DLL file. So what you need to do is figure out what the actual problem is, which is probably not  just  a missing DLL file. To do that, you need to find a troubleshooting guide for the specific issue.

17. PREPARED BY: POOJA DOSHI for your attention