fChangeSize (Function)

WINDEV, WEBDEV AND WINDEV MOBILE
ONLINE HELP

Version:

Home | Sign in | English

Functions for managing external files

fChangeSize

Presentation

Example

Operating mode in Windows Vista (and later)

See also

Constants for the external files

Functions for managing external files

Handling the external files

Storing files in Android

Summary table: Managing the application directories according to the platform

fDetectRemovableStorage

fReadLineRegularExpression

fRemoveDir

fRename

fReportsAndQueriesDir

Operating mode in Windows Vista (and later)

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

fChangeSize (Function)

In french: fChangeTaille

Resizes an external file.

Versions 15 and later

This function is now available for the Android applications.

This function is now available for Java applications.

New in version 15

This function is now available for the Android applications.

This function is now available for Java applications.

This function is now available for the Android applications.

This function is now available for Java applications.

Versions 16 and later

This function is now available for Windows Phone applications.

New in version 16

This function is now available for Windows Phone applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available for PHP sites.

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available for PHP sites.

This function is now available in Universal Windows 10 App mode.

This function is now available for PHP sites.

This function is now available in Universal Windows 10 App mode.

Example

// Open an external file
FileID = fOpen("C:\MyDirectories\File.txt", foReadWrite)
IF FileID <> -1 THEN
// Change the size
Res = fChangeSize(FileID, 200)
...
END

Syntax

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

<Result>: Boolean

True if the change of size was performed,
False otherwise.

<File identifier>: Integer

Identifier of the file to use, defined by fOpen or fCreate.

<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.
The file is enlarged if the new size is greater than the initial size: the content between the former size and the new size is not defined.

Remarks

Operating mode in Windows Vista (and later)

If this function does not operate 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).

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

Programming tip: To handle and/or modify the files or directories without administrator privileges, you should:

avoid writing into the Windows directory or into the "Program Files" directory,
use the system directory corresponding to the application (returned by SysDir associated with the srCommonAppData constant).

Component : wd240std.dll