What is the file format of computer desktop icons?

In the Windows operating system, the file name of a single icon has the suffix .ICO. Icons in this format can be browsed directly in the Windows operating system; the suffix .ICL represents the icon library, which is a collection of multiple icons, the general operating system does not directly support files in this format, and you need to browse them with the help of third-party software.

There are also some special icons that can be invoked directly in a programming language.

You can use the system's own drawing tools to open your picture and then shrink it to the same size as the desktop icon, and finally save it in the filename after adding a ".ico" save the type of BMP line, go to the directory of the save to see, is not the system's default file for the icon file

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