FindLibrary[lib] finds a dynamic library that can be loaded by LibraryFunctionLoad.
LibraryFunctionError[name, code] represents an error returned from a LibraryFunction.
LibraryFunctionInformation[fun] returns information about a LibraryFunction.
LibraryFunctionUnload[fun] unloads a LibraryFunction so that it cannot be used.
LibraryLoad[lib] loads the dynamic library lib into the Mathematica runtime.
LibraryUnload[lib] unloads all functions that have been loaded from a Wolfram Library, then it unloads the library.
$LibraryPath gives the default list of directories to search in attempting to find a library.
FileNameJoin[{"name_1", "name_2", ...}] joins the name_i together into a file name suitable for your current operating system.
FileNameTake["name"] gives the last path element in the file name " name".FileNameTake["name", n] gives the first n path elements in the file name " ...
FileNameDrop["name", n] drops the first n path elements in the file name " name".FileNameDrop["name", -n] drops the last n path elements in the file name " ...