ONLINE HELP
 WINDEV, WEBDEV AND WINDEV MOBILE

Version: 2026
Linking a Table control to a data file or query
A Table control can be used to display the content of a data file or query...
Creating an executable: Data file directory
Two types of directories can be configured when creating the executable...
Generating a description of a data file from a window or from a page
When you design a quick prototype, you often create windows (or pages) without defining any data files...
Looper control linked to a data file
A Looper control can be used to display the content of a data file or query...
How do I run through a data file?
Analysis: Description of data file structure
The analysis allows you to define the structure of data files used by the project...
HDescribeLink (Function)
Describes a link between two data files programmatically.
HListWatchedFiles (Function)
Returns the list of data files watched by HWatch.
HOpen (Function)
Opens a data file.
HSavePosition (Function)
Stores the current file context (current record, filter, pointers).
<Connection variable>.ListWatchedFiles (Function)
Returns the list of data files watched by HWatch.
HExportXML (Function)
Exports the records found in a data file (HFSQL or OLE DB), view or query to an XML file.
HListSynonym (Function)
Returns the list of synonyms used by a full-text index.
<Source>.SetPosition (Function)
Sets the position on a record, based on the approximate position of one of its items.
<Source>.Read (Function)
Reads a record in a file according to a given record number.
HDescribeFile (Function)
Describes a data file programmatically.
<Source>.ReadLast (Function)
Sets the position on the last record of a data file according to a browse item.
<Source>.ListItem (Function)
Returns the list of items in a data file (query or view) recognized by the HFSQL engine. The data files defined by HDeclare, HDeclareExternal and HDescribeFile are taken into account.
<Source>.ListSynonym (Function)
Returns the list of synonyms used by a full-text index.
HFTListWord (Function)
Lists the words of the current record that will be taken into account by the full-text indexing.
HErrorPassword (Function)
After the execution of a read or write function in a data file, used to find out whether an error caused by a wrong password occurred on this data file.
Managing connections
WINDEV, WEBDEV and WINDEV Mobile propose different methods for describing a connection...
<Source>.Out (Function)
Allows you to find out whether the record on which you want to be positioned is located outside the data file, filter, view or query.
HRetrieveRecord (Function)
Returns the content of the current record (in a file, a view or a query, ...).
HWatch (Function)
Trigger monitoring of write actions (add, modify or delete) performed on a data file present on an HFSQL server. In case of modification, a specific procedure can be triggered.
<Source>.ListFullTextIndex (Function)
Returns the list of full-text indexes of a file (a query or a view) recognized by the HFSQL engine.
<Source>.WatchStop (Function)
Stops watching a data file on an HFSQL server.
HRestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): record in progress, filter, playback pointers.
<Source>.ExportCSV (Function)
Exports the records found in a data file (HFSQL or OLE DB), a view or a query to a CSV file.
Unalterable data files
This feature is used to signal that a data file cannot be modified after writing...
<Source>.Last (Function)
Sets the position on the last record of a data file according to a browse item.
<Source>.ListSpatialKeys (Function)
Returns the spatial keys of a data file (used in a query or view) recognized by the HFSQL engine.
HReadNext (Function)
Sets the position on the next data file record according to a browse item.
HErrorIntegrity (Function)
Used to check whether an integrity error occurred.
HListItem (Function)
Returns the list of items:
  • found in a data file ( a query or a view) known to the HFSQL engine. The data files defined by HDeclare, HDeclareExternal and HDescribeFile are taken into account.
  • found in a Record variable.
<Source>.UnlockFile (Function)
Unlocks the records of a data file:
  • locked by HLockFile.
  • individually locked by a locking read function.
fDataDir (Function)
Returns the full path of the directory of HFSQL data files specified by the user when installing the application.
<Source>.Found (Function)
Checks whether the current record corresponds to the current filter or search.
HCancelAlias (Function)
Cancels an alias that was declared beforehand by HAlias.
HUnlockRecNum (Function)
Unlocks a record locked by:
  • HLockRecNum,
  • a read function used with a locking parameter (HRead associated with the hLockWrite or hLockReadWrite constant for example).
HListLink (Function)
Returns the list of data file bindings (Merise type) present:
  • in the current analysis,
  • in ongoing analyses (projects with multiple analyses).
  • in a specific analysis.
HWatchStop (Function)
Stops watching a data file on an HFSQL server.
HCheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
<Source>.ExportXML (Function)
Exports the records found in a data file (HFSQL or OLE DB), view or query to an XML file.
<Source>.GetCurrentPosition (Function)
Returns the approximate position of current record in the data file.
HListFullTextIndex (Function)
Returns the list of full-text indexes of a file (a query or a view) recognized by the HFSQL engine.
HFound (Function)
Checks whether the current record corresponds to the current filter or search.
HLast (Function)
Sets the position on the last record of a data file according to a browse item.
HListFile (Function)
Returns the list of files:
  • current analysis.
  • analyses in progress (projects with multiple analyses).
  • a specific analysis recognized by the HFSQL engine.
  • available on a connection via a Native Connector or an OLE DB driver.
  • for a group of files defined in the data model editor.
<Source>.NoModif (Function)
Forbids all the modifications on a data file (for all the programs, including the one that requested the no-modification policy).
<Source>.ReadPrevious (Function)
Sets the position on the previous record of a file according to a browse item.
HDeleteAll (Function)
Deletes all records from a data file, an HFSQL view or a query.
<Source>.CreateView (Function)
Creates an HFSQL view.
This function uses the former view mechanism.
<Source>.Previous (Function)
Sets the position on the previous record of the data file according to a browse item.
HDescribeFullTextIndex (Function)
Describes a full-text index of data file created programmatically.
<Source>.RecordToString (Function)
Converts the content of the current record to string (in a data file, HFSQL view, query, etc.).
<Source>.UnlockRecNum (Function)
Unlocks a record locked by:
  • HLockRecNum,
  • a read function used with a locking parameter (HRead associated with the hLockWrite or hLockReadWrite constant for example).
<Source>.DeleteAll (Function)
Deletes all records from a data file, an HFSQL view or a query.
<Source>.Next (Function)
Sets the position on the next data file record according to a browse item.
HUnlockFile (Function)
Unlocks the records of a data file:
  • locked by HLockFile.
  • individually locked by a locking read function.
<Source>.DescribeFile (Function)
Describes a data file programmatically.
<Source>.RetrieveRecord (Function)
Returns the content of the current record (in a file, a view or a query, ...).
<Source>.First (Function)
Sets the position on the first record of a data file according to the specified browse item.
HErrorLock (Function)
Used to check whether a lock error occurred.
HListStopWord (Function)
Returns the list of stop words used by a full-text index.
<Source>.ExportJSONString (Function)
Exports the records from a data file (HFSQL or OLE DB), view or query to a JSON string.
HReadPrevious (Function)
Sets the position on the previous record of a file according to a browse item.
<Source>.DeleteView (Function)
Deletes a previously created view. This function uses the former view mechanism.
<Source>.Delete (Function)
Deletes a record from a data file (query or view).
<Source>.ReadNext (Function)
Sets the position on the next data file record according to a browse item.
<Source>.Open (Function)
Opens a data file.
<Source>.RestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): record in progress, filter, playback pointers.
<Source>.Reset (Function)
Initializes:
  • one or all variables of file items with their default values.
  • one or all items of a Record variable with their default values.
HEndNoModif (Function)
Unlocks a file that was locked by the same program with HNoModif.
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.
<Source>.Close (Function)
Closes either a data file or all data files opened by the current user: all corresponding physical data files are closed for the current user.
HDBCreation (Function)
Ends the description of the structure of an xBase data file programmatically.
HPrevious (Function)
Sets the position on the previous record of the data file according to a browse item.
<Source>.DeactivateFilter (Function)
Temporarily disables the filter on a data file (view or query).
HCreateView (Function)
Creates an HFSQL view.
This function uses the former view mechanism.
<Source>.ListLink (Function)
Returns the list of links (Merise) in the current analysis or in a specific analysis.
<Source>.ExportJSON (Function)
Exports the records found in a data file (HFSQL or OLE DB), view or query to a JSON file.
HExportJSONString (Function)
Exports the records from a data file (HFSQL or OLE DB), view or query to a JSON string.
HExportXLS (Function)
Exports records from a data file (HFSQL or OLE DB), view or query to an Excel file (XLSX).
HFirst (Function)
Sets the position on the first record of a data file according to the specified browse item.
HOut (Function)
Used to find out whether the record on which you want to be positioned is located outside the data file, filter, view or query.
<Source>.SavePosition (Function)
Stores the current context of a data file: current record, filter, read pointers.
<Source>.ListStopWord (Function)
Returns the list of stop words used by a full-text index.
HReadLast (Function)
Sets the position on the last record of a data file according to a browse item.
<Source>.ListKey (Function)
Returns the list of keys in a data file (query or view) recognized by the HFSQL engine.
HFilter (Function)
Defines and enables a filter on a data file, view or query.
NULL values in HFSQL
WINDEV, WEBDEV and WINDEV Mobile support NULL values in items of HFSQL data files and for all other types of access (Native, OLE DB...
HWrite (Function)
Writes a record into a data file without updating the indexes corresponding to all keys used in the file.
HDelete (Function)
Deletes a record from a data file (query or view).
<Source>.Watch (Function)
Trigger monitoring of write actions (add, modify or delete) performed on a data file present on an HFSQL server. In case of modification, a specific procedure can be triggered.
HDescribeSemanticIndex (Function)
Defines a semantic index of a data file created programmatically.
HSetPosition (Function)
Sets the position on a record, based on the approximate position of one of its items.
<Source>.FTListWord (Function)
Lists the words of the current record that will be taken into account by the full-text indexing.
HDeleteView (Function)
Deletes a previously created view. This function uses the former view mechanism.
HRead (Function)
Reads a record in a file according to a given record number.
HNext (Function)
Sets the position on the next data file record according to a browse item.
HRecordToString (Function)
Converts the content of the current record to string (in a data file, HFSQL view, query, etc.).
HGetCurrentPosition (Function)
Returns the approximate position of current record in the data file.
<Source>.ExportXLS (Function)
Exports records from a data file (HFSQL or OLE DB), view or query to an Excel file (XLSX).
<Source>.CheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
HDeactivateTrigger (Function)
Disables a trigger.
HListREP (Function)
Returns the list of assignments for the data files handled by the current application, which means the list of physical files corresponding to the files described in the analysis.
HListKey (Function)
Returns the list of keys in a data file (query or view) recognized by the HFSQL engine.
HClose (Function)
Closes either a data file or all data files opened by the current user: all corresponding physical data files are closed for the current user.
HDeactivateFilter (Function)
Temporarily disables the filter on a data file (view or query).
HNoModif (Function)
Forbids all the modifications on a data file (for all the programs, including the one that requested the no-modification policy).
HDescribeTrigger (Function)
Adds or modifies a trigger on an HFSQL data file.
HListSpatialKey (Function)
Returns the spatial keys of a data file (used in a query or view) recognized by the HFSQL engine.
Zombie data files and items
During the life of an application, items live and die...
<Source>.EndNoModif (Function)
Unlocks a file that was locked by the same program with HNoModif.
HExportJSON (Function)
Exports the records found in a data file (HFSQL or OLE DB), view or query to a JSON file.
HReset (Function)
Initializes:
  • one or all variables of file items with their default values.
  • one or all items of a Record variable with their default values.
HExportCSV (Function)
Exports the records found in a data file (HFSQL or OLE DB), a view or a query to a CSV file.
Using Unicode in HFSQL data files
The analysis proposes two types of Unicode items ...
<Source>.Filter (Function)
Defines and enables a filter on a data file, view or query.
<Source>.Write (Function)
Writes a record into a data file without updating the indexes corresponding to all keys used in the file.
<Source>.DescribeTrigger (Function)
Adds or modifies a trigger on an HFSQL data file.
HDescribeItem (Function)
Describes a file item programmatically.
Global procedure/function
A global procedure can be used in all the processes or events of the project....
sRead (Function)
Reads a character string in the entry buffer of the specified serial port.
Managing pinned projects
The home window of WINDEV, WEBDEV and WINDEV Mobile allows you to manage the pinned projects when opening an existing project......
SpeechSynthesisReadText (Function)
Reads the specified text using the device's text-to-speech engine....
REST Webservices: Automatic deserialization of request
In a REST Webservice, an entry point can have several types......
Handling the cells of report table
The operations that can be performed on the table cells are as follows:...
Serialize (Function)
Transforms the following elements into a specific format: a structure (and its subelements), a class (and its subelements), an array (including the associative arrays), a queue, a stack, a list....
1. Website deployment requirements
WEBDEV Tutorial - Website deployment Lesson 1 - Website deployment requirements - 30 min
Word Processing constants
The following constants are used by the functions for managing the Word Processing control:...
Optimizing the connection times to the HFSQL Client/Server databases
This help page explains how to optimize the connection times to the HFSQL Client/Server databases by limiting the network traffic......
The "Dictionary" pane
The "Dictionary" pane is used to handle the WINDEV dictionaries ("......
Image editor: Features
The image editor includes several features......
DeclareWebserviceContext (Function)
Used to declare a list of variables whose value will be persistent between the successive calls to a Webservice.
Constants for managing videos
List of constants used by the functions for video management....
Monitoring robot: Creating a check
The monitor of the monitoring robot is used to create the different checks that must be performed by the monitoring robot......
AAF: Did you know?
Our surveys show that end users love AAFs (Automatic Application Features) and that these AAFs increase their satisfaction and efficiency when using the applications......
SysIconAdd (Function)
Adds a system tray icon (in the lower-right corner of the screen).
SecurePassword (Type of variable)
The SecurePassword type is a structured type used to obtain a secure, hashed and salted password.
Operating mode of dynamic Active WEBDEV Pages
Project Management Hub: Managing projects
Project Management Hub: Management of projects (view, creation, ...)...
xmlReader (Type of variable)
The xmlReader type is used to read an XML document without loading it in memory.
Cookie (Type of variable)
The Cookie type is used to handle the cookies transmitted in the HTTP requests.
New Features brochure - Version 27: New WEBDEV features
New features in WEBDEV 27 presented in the New Features brochure....
Android: Conditions for using the Map control
Up to WINDEV Mobile version 180046, the Google Maps API library was required to use a Map control in an Android application......
WINDEV: Example of programmed Drag and Drop
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