Other īesides these, there are also many custom EXE formats, including but not limited to W3 (a collection of LE files, only used in WIN386.EXE), W4 (a compressed collection of LE files, only used in VMM32.VXD), DL, MP, P2, P3 (last three used by It supports package titles, confirmation prompts, license agreements, and post-install commands using an. It uses self-extraction directive (.sed) files to extract files, optionally running an installation command. IExpress is Windows program that makes self-extracting. In most cases, code can be written to simply work as either a 32 or 64-bit PE file.

64-bit Portable Executable (PE32+) Introduced by 64-bit versions of Windows, this is a PE file with wider fields. 32-bit Portable Executable Introduced with Windows NT, these can be identified by the 'PE' in ASCII (although not at the beginning these files also begin with 'MZ'). A few dual-mode programs (MZ-NE or MZ-PE) such as regedit and older WinZIP self extractors include a more functional DOS section. Started in DOS the stub typically displays a message 'This program cannot be run in DOS mode' (or similar) before exiting cleanly, this thereby constituting a minimal form of fat binary. When a 16-bit or 32-bit Windows executable is run by Windows, execution starts at either the NE or the PE, and ignores the MZ code known as DOS stub.

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