fChangeSize (Function)

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Operating mode in Windows Vista (and later)

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fChangeSize (Function)

In french: fChangeTaille

Resizes an external file.

Example

// Ouverture d'un fichier externe 
IDFichier is int
Res is boolean
IDFichier = fOpen("C:\MesRépertoires\Fichier.txt", foReadWrite)
IF IDFichier <> -1 THEN
	// Changement de taille
	Res = fChangeSize(IDFichier, 200)
	...
END

MonFichierTxt is DiskFile
Res is boolean
// Ouverture d'un fichier externe 
MonFichierTxt = fOpen("C:\MesRépertoires\Fichier.txt", foReadWrite)
IF NOT ErrorOccurred THEN
	// Changement de taille
	Res = fChangeSize(MonFichierTxt, 200)
	...
END

Syntax

<Result> = fChangeSize(<File used> , <New file size>)

<Result>: Boolean

True if the size changed,
False otherwise.

<File used>: Integer or DiskFile variable

Identifier of the file to use, defined by fOpen or fCreate.
Name of the DiskFile variable initialized with fOpen or fCreate.
Not available.

<New file size>: Integer

New size of the file in bytes.
The file is truncated if the new size is less than the initial size.
If this new size is larger than the original file size, the file is enlarged: the content between the old size and the new size is not defined..

Remarks

Operating mode in Windows Vista (and later)

If this function does not work properly in Windows Vista (and later), check whether the file or directory used is not in one of the system directories (Windows directory or "Program Files" directory).

In Windows Vista (and later), with the UAC mechanism (User Account Control) enabled, you must have administrator privileges to handle and/or modify the files or directories in system directories (Windows directory or "Program Files" directory).

Programming tip: If you need to manipulate / modify files or directories, without needing administrator privileges, it is advisable:

avoid writing to the Windows directory or to the "Program Files" directory,
use the system directory of the application (returned by SysDir with the srAppDataCommun constant, for example).

Business / UI classification: Business Logic

Component: wd300std.dll