CreateFile

C:\lazarus2.0.2\fpc\3.0.4\source\rtl\win\wininc\ascdef.inc

function CreateFile(lpFileName:LPCSTR; dwDesiredAccess:DWORD; dwShareMode:DWORD; lpSecurityAttributes:LPSECURITY_ATTRIBUTES; dwCreationDisposition:DWORD;dwFlagsAndAttributes:DWORD; hTemplateFile:HANDLE):HANDLE; external 'kernel32' name 'CreateFileA';

   Result := CreateFile(
                PChar(AFile),
                GENERIC_READ or GENERIC_WRITE,
                FILE_SHARE_READ or FILE_SHARE_WRITE,
                nil,
                OPEN_EXISTING,
                0,
                0);

pointeur vers le nom du fichier PChar(AFilename)

• 0 : l'application peut interroger certaines métadonnées telles que les attributs de fichiers, de répertoires ou de périphériques sans accéder à ces fichiers ou périphériques.
• GENERIC_READ ($8000 0000) : Accés en écriture
• GENERIC_WRITE ($4000 0000) : Accés en Lecture
• GENERIC_READ or GENERIC_WRITE ($C000 0000): Accés en écriture et lecture
• FILE_ADD_FILE (2) : Pour un répertoire, le froits de créer un fichier dans ce répertoire.
• FILE_ADD_SUBDIRECTORY (4) : For a directory, the right to create a subdirectory.
• FILE_ALL_ACCESS : All possible access rights for a file.
• FILE_APPEND_DATA (4) :
  • Pour un fichier : the right to append data to the file. (For local files, write operations will not overwrite existing data if this flag is specified without FILE_WRITE_DATA.)
  • Pour un répertoire: the right to create a subdirectory (FILE_ADD_SUBDIRECTORY).
• FILE_CREATE_PIPE_INSTANCE (4) : For a named pipe, the right to create a pipe.
• FILE_DELETE_CHILD ($40) : For a directory, the right to delete a directory and all the files it contains, including read-only files.
• FILE_EXECUTE ($20) : For a native code file, the right to execute the file. This access right given to scripts may cause the script to be executable, depending on the script interpreter.
• FILE_LIST_DIRECTORY (1) : For a directory, the right to list the contents of the directory.
• FILE_READ_ATTRIBUTES (128/$80) :The right to read file attributes.
• FILE_READ_DATA (1) : For a file object, the right to read the corresponding file data. For a directory object, the right to read the corresponding directory data.
• FILE_READ_EA (8) : The right to read extended file attributes.
• FILE_TRAVERSE (32/$20) : For a directory, the right to traverse the directory. By default, users are assigned the BYPASS_TRAVERSE_CHECKING privilege, which ignores the FILE_TRAVERSE access right. See the remarks in File Security and Access Rights for more information.
• FILE_WRITE_ATTRIBUTES (256/$100) : The right to write file attributes.
• FILE_WRITE_DATA (2) : For a file object, the right to write data to the file. For a directory object, the right to create a file in the directory (FILE_ADD_FILE).
• FILE_WRITE_EA (16/$10) : The right to write extended file attributes.
• STANDARD_RIGHTS_READ : Includes READ_CONTROL, which is the right to read the information in the file or directory object's security descriptor. This does not include the information in the SACL.
• STANDARD_RIGHTS_WRITE : Same as STANDARD_RIGHTS_READ.

Vous ne pouvez pas demander un mode d'accès qui entre en conflit avec le mode de partage spécifié par le paramètre dwShareMode dans une requête ouverte qui a déjà un identifiant ouvert.

source : https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilea