Vision VTB-101 Guide de l'utilisateur télécharger pdf (Page 69)

VTB USER GUIDE

.SeekRel(handle as int, offs as long) as char

Sets the offset from the current position of the file.

Parameters

handle Reference number of the file

offset Value of the offset in number of bytes

Example

err=disk.OpenRead(1,”\data\table.dat”) ‘ open the file

...

err=disk.Seek(1,200) ‘ set current position at 200 bytes

CHDIR

Changing of current directory. All successive functions without a complete path will refer to the current one.

Syntax

.Chdir(path as *char) as char

Parameters

path Name of the directory, it can contain also the complete path

Example

err=disk.Chdir(”programs”)

err=disk.OpenCreate(1,”file.txt”) ' create the file file.txt in the directory

' programs

MKDIR

Creates a new directory and returns error if it already exists.

Syntax

.Mkdir(path as *char) as char

Parameters

path Name of the directory, it can contain also the complete path

Example

err=disk.Mkdir(”\test\text”) ' create the directory text in \test

DELETE, ERASE, KILL

Delete a file or a directory. The same function can be called with three different names.

Syntax

.Delete(path as *char) as char

.Erase(path as *char) as char

.Kill(path as *char) as char

Parameters

path Name of the directory, it can contain also the complete path

Example

err=disk.kill(”\test\text”) ' delete the directory/file text in \test

RENAME

Renames a file or a directory. It returns error if the new name already exists.

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Vision VTB-101 Guide de l'utilisateur Page 69