Dynamic-link library

Microsoft's implementation of the shared library concept in Windows and OS/2 / From Wikipedia, the free encyclopedia

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Dynamic-link library (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). The file formats for DLLs are the same as for Windows EXE files – that is, Portable Executable (PE) for 32-bit and 64-bit Windows, and New Executable (NE) for 16-bit Windows. As with EXEs, DLLs can contain code, data, and resources, in any combination.

Quick facts: Filename extension, Internet media type,...
Dynamic link library
Filename extension
Internet media type
Uniform Type Identifier (UTI)com.microsoft.windows-dynamic-link-library
Magic numberMZ
Developed byMicrosoft
Container forShared library

Data files with the same file format as a DLL, but with different file extensions and possibly containing only resource sections, can be called resource DLLs. Examples of such DLLs include icon libraries, sometimes having the extension ICL, and font files, having the extensions FON and FOT.[1]

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