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What are MZ Files?

Published in Computer Programming 2 mins read

MZ files are a type of executable file format commonly used in the Microsoft Windows operating system. They are also known as DOS Executable files or PE (Portable Executable) files, and they contain instructions that the computer can execute.

Here's a breakdown:

MZ Header:

  • The "MZ" in MZ files refers to the first two bytes of the file, which stand for "Mark Zbikowski", the developer who created the original DOS executable format.
  • This header contains essential information about the file, including the file size, the location of the program's entry point, and other metadata.

PE Header:

  • Modern MZ files also contain a PE header, which provides more detailed information about the executable, such as its architecture, version, and dependencies.
  • The PE header helps the operating system load and run the program correctly.

Executable Code:

  • The rest of the MZ file contains the actual executable code that the computer will run.
  • This code can be written in various programming languages, such as C++, C#, or assembly language.

Examples of MZ Files:

  • .exe files: These are the most common type of MZ files, and they are used to run programs on Windows.
  • .com files: These are older DOS executable files that are less common today.
  • .dll files: These are dynamic link libraries that contain code that can be shared by multiple programs.

Practical Insights:

  • MZ files are essential for running programs on Windows.
  • Understanding the structure of MZ files can be helpful for debugging and analyzing software.
  • You can use tools like PE Explorer to examine the contents of MZ files.

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