dynaminc linked libaries

Question

How to create .dll files?and what is the use of .dll files?

Subash · Answer

thanks manoj

Manoj Bhoir · Answer

Hi Dynamic - link library (also written unhyphenated) or DLL is Microsoft's implementation of the shared library concept in the Microsoft Windows and OS/2 operating systems. These libraries usually have the file extension DLL OCX (for libraries containing ActiveX controls) or DRV (for legacy system drivers). Advantages of DLL Given below are a few advantages of having DLL files. Uses fewer resources DLL files don't get loaded into the RAM together with the main program; they don't occupy space unless required. When a DLL file is needed it is loaded and run. For example as long as a user of Microsoft Word is editing a document the printer DLL file is not required in RAM. If the user decides to print the document then the Word application causes the printer DLL file to be loaded and run. Promotes modular architecture A DLL helps promote developing modular programs. It helps you develop large programs that require multiple language versions or a program that requires modular architecture. An example of a modular program is an accounting program having many modules that can be dynamically loaded at run-time. Aid easy deployment and installation When a function within a DLL needs an update or a fix the deployment and installation of the DLL does not require the program to be relinked with the DLL. Additionally if multiple programs use the same DLL then all of them get benefited from the update or the fix. This issue may occur more frequently when you use a third-party DLL that is regularly updated or fixed. Applications and DLLs can link to other DLLs automatically if the DLL linkage is specified in the IMPORTS section of the module definition file as a part of the compile. Else you can explicitly load them using the Windows LoadLibrary function. For more details please check these links : http://www.tutorialspoint.com/dll/ https://en.wikipedia.org/wiki/Dynamic-link_library https://msdn.microsoft.com/en-us/library/windows/desktop/ms682589(v=vs.85).aspx https://support.microsoft.com/en-in/kb/815065 Hope this will help you to understand Dll.

Ehsan Sajjad · Answer

You need to create a program using Visual Studio for that

Subash · Answer

thank you friend but searching for sample code

Ehsan Sajjad · Answer

Here is the definition of it form google: A dynamic link library (DLL) is a collection of small programs any of which can be called when needed by a larger program that is running in the computer. The small program that lets the larger program communicate with a specific device such as a printer or scanner is often packaged as a DLL program (usually referred to as a DLL file).    When you write some code that needs to be shipped to server in case of web application and on client machine in case of desktop application the source code we write gets compiled in case of .Net code is converted in to another language which is called MSIL intermediate language which is stored in the DLL. I hope it helps.