HUnlockFile (Function)

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HUnlockFile (Function)

In french: HDébloqueFichier

Not available with these kinds of connection

Unlocks the records of a data file:

locked by HLockFile.
individually locked by a locking read function.

The data file can also be unlocked by closing it (HClose).

Remark: HUnlockFile cannot be used to unlock a data file locked by another session or by another program. We advise you to unlock a data file as soon as possible in order for the other sessions to be able to access this data file.

This function can be used with HFSQL Client/Server data files.

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 Windows Store apps mode.

New in version 18

This function is now available in Windows Store apps mode.

Versions 19 and later

This function is now available for Android applications.

This function is now available in Android Widget mode.

New in version 19

This function is now available for Android applications.

This function is now available in Android Widget mode.

This function is now available for Android applications.

This function is now available in Android Widget mode.

Versions 21 and later

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

New in version 21

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

Remark: From version 19, HFSQL is the new name of HyperFileSQL.

Example

// Lock
HLockFile(CUSTOMER, hLockReadWrite)
// Modify the file
...
// Unlock
HUnlockFile(CUSTOMER)

Syntax

<Result> = HUnlockFile([<Data file>])

<Result>: Boolean

True if the data file was unlocked,
False if a problem occurred (the data file is not locked, ...). HError is used to identify the error.

<Data file>: Optional character string (with or without quotes)

Name of data file used.
If this name is not specified, HUnlockFile will use the last data file used by the last HFSQL management function (function starting with "H").

Remarks

HUnlockFile has no effect if:

the data file is in single-user mode (see HMode).
the data file is not locked.
the data file was locked by another program.

Component : wd250hf.dll