"FILE_SHARE_READ" is not defined

as a standalone term. It is a constant value that is used in programming to specify the type of access that can be granted to a file by different processes or threads.

In Microsoft Windows programming, FILE_SHARE_READ is a value that can be used as a parameter when opening a file using the CreateFile function. It specifies that the file can be opened for read access, and allows other processes or threads to access the file for reading as well.

The constant value is typically defined in a header file or library that is included in the source code of a program. If you are encountering an error message that says "FILE_SHARE_READ is not defined," it may indicate that the header file or library that defines this constant is not being properly included or referenced in your code.