// Get the base directory of the program.
// Get the full path to the module.
().
// Get and set the fully qualified directory of the current directory (the directory from which the process starts).
// Get the current working directory of the application.
()
// Get and set the name of the directory that includes the application.
// Get the path to the executable file that started the application.
// Get the path and file name of the executable file that started the application