ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2026

Using the Control Centers in Client/Server mode
All the Control Centers provided with WINDEV, WEBDEV and WINDEV Mobile use the same database...
Installing an HFSQL Client/Server server with an application
When creating the setup program of a WINDEV application using HFSQL Client/Server data files, the wizard allows you to...
User Groupware and Client/Server data files
Applications using the User Groupware are compatible with HFSQL databases in Client/Server mode...
HFSQL Client/Server: Overview
You have the ability to create applications that access the HFSQL Client/Server databases...
HFSQL Client/Server: Backing up databases
Like for any database, backups of your HFSQL Client/Server databases must be performed on a regular basis...
HFSQL Client/Server database: Recommendations
This help page presents the main recommendations for optimizing the security and performance of an HFSQL Client/Server database according to the constraints and desired features...
User Groupware and Client/Server data files
An application that uses the User Groupware can be used with an HFSQL database in Client/Server mode...
How to backup HFSQL Client/Server databases?
The backup of the HFSQL Client/Server databases can be performed ...
Restoring an HFSQL Client/Server database
A backup of an HFSQL Client/Server database can be restored at any time...
HFSQL Client/Server functions (prefix syntax)
Several HFSQL functions are used to manage the HFSQL Client/Server data...
HFSQL Client/Server functions
Several HFSQL functions are used to manage the HFSQL Client/Server data...
Unalterable data files
This feature is used to signal that a data file cannot be modified after writing...
WDLog: Backup of HFSQL data files
WDLog allows you to save all the HFSQL data files used by a WINDEV or WEBDEV application...
HCheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
HManageServerUpdate (Function)
Allows you to manage the automatic update of HFSQL Client/Server servers and to define how often to check for updates.
<Connection variable>.SendMessageToClient (Function)
Displays a message on the client computers.
<HFSQL connection>.CheckIndexAsynchronous (Function)
Checks that the data contained in the index file (.NDX file) correctly references the data contained in the HFSQL Client/Server data file (.FIC file).
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
HCheckMemoAsynchronous (Function)
Checks the structural integrity of memos in an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
<HFSQL connection>.ReindexAsynchronous (Function)
Rebuilds the index of an HFSQL Client/Server data file (".NDX" file). This operation is asynchronous, i.e., it is performed on the server and does not block the client side.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Remote HFSQL Administrator: Overview
The remote HFSQL administrator is a WEBDEV site installed with the WEBDEV application server and used to remotely manage the HFSQL Client/Server databases installed on the Web server...
HCheckIndexAsynchronous (Function)
Checks that the data contained in the index file (.NDX file) correctly references the data contained in the HFSQL Client/Server data file (.FIC file).
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
HSendMessageToClient (Function)
Displays a message on the client computers.
<HFSQL connection>.StatCalculateAsynchronous (Function)
Gets various statistics on the keys of an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
HReindexAsynchronous (Function)
Rebuilds the index of an HFSQL Client/Server data file (".NDX" file). This operation is asynchronous, i.e., it is performed on the server and does not block the client side.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Managing the load balancing (dynamic load balancing on server)
The server that is hosting a HFSQL database engine can be very busy...
<Source>.CheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
<Connection variable>.ManageServerUpdate (Function)
Used to manage the automatic update of HFSQL Client/Server servers by specifying the check frequency regarding the availability of updates.
HFSQL Cluster functions
The following functions are used to manage an HFSQL cluster
HStatCalculateAsynchronous (Function)
Gets various statistics on the keys of an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
<HFSQL connection>.CheckMemoAsynchronous (Function)
Checks the structural integrity of memos in an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Notifications of an HFSQL server
A server may encounter problems without any user (or developer) noticing anything.
For example:
  • a scheduled task may fail,
  • an automatic backup may fail,
  • a node may become inactive in an HFSQL cluster, ...
HFSQL server configuration
The HFSQL Control Center allows you to fully manage HFSQL servers......
The OLE control
The OLE control is used to handle an OLE object......
Control Centers: Working in offline mode
When working on a laptop computer or on an offline computer, you may want to continue working with the data found in the Control Centers (schedule management, quality management, etc....
ODBC driver for HFSQL Classic and HFSQL Client/Server - License agreement
OLE DB driver for HFSQL Classic and HFSQL Client/Server - License agreement
Log-based replication
The replication is the operation allowing you to keep updated remote databases of identical structures on which several operations are performed......
Working with the Source Code Manager
The principle for working with the Source Code Manager is as follows......
Handling data files in PHP
WEBDEV allows you to create a PHP site that handles data files......
HFSQL Control Center: Open an analysis
The HFSQL Control Center allows you to fully manage an analysis......
WDMap: Overview
WDMap is a tool used to view and handle a data file while developing an application......
The source code manager
WINDEV, WEBDEV and WINDEV Mobile propose a sophisticated Source Code Manager......
Application triggers
...A trigger is a WLanguage procedure automatically called by the HFSQL engine whenever a modification is performed (addition, deletion, modification, ...) on a record of a data file....
Errors while managing data files
When an HFSQL function fails (returns False for example), the corresponding error number is returned by HError......
Custom-Folders in the analysis
Several file descriptions can be grouped into a "Custom-Folder"......
HClient structure
The HClient structure is used to......
Natif Informix Connector for WINDEV and WEBDEV
WINDEV and WEBDEV propose an optional Native Connector to Informix (also called Native Access......
<Connection variable>.AddUser (Function)
Adds a user to a database.
<Connection variable>.AddGroup (Function)
Adds a group of users.
<Connection variable>.TransactionIsolation (Function)
Configures the isolation mode of transactions for a connection to an HFSQL server.
<Connection variable>.ModifyTask (Function)
Modifies a scheduled task on the HFSQL server defined by the connection.
HAddUser (Function)
Adds a user to a database.
HAddGroup (Function)
Adds a group of users.
HFSQL Control Center: HFSQL Cluster management
The HFSQL Control Center includes all the tools needed to manage HFSQL clusters......
HTransactionIsolation (Function)
Configures the isolation mode of transactions for a connection to an HFSQL server.
HClearWorkingDir (Function)
Clears and destroys the temporary directory previously created when HServerWorkingDir was executed.
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