WinAPI

The Windows API (WinAPI) is the application programming interface (API) that allows Windows programs to access the features provided by the Microsoft Windows Operating System.

Many functions within the Windows API have ANSI and UNICODE versions of the same function. These are suffixed with an A or W respectively. Example: CreateFileA and CreateFileW.

https://en.wikipedia.org/wiki/Windows_API https://en.wikipedia.org/wiki/Microsoft_Windows_library_files

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