ONLINE HELP
 WINDEV, WEBDEV AND WINDEV MOBILE

Version: 2026
HAdd (Example)
Usage example of the HAdd function
NewRecord (Property)
The NewRecord property is used to determine if the record is a new record or if it comes from the data file.
Assignment of RETURN
The return value of the process currently run can be assigned...
<Source>.ErrorModification (Function)
Returns the value of a record item when a modification conflict occurs..
ImageInfoSave (Function)
Saves the modifications performed on the Exif tags of an image by ImageInfoModify.
HErrorStatusModification (Function)
Returns the status of a record during a modification conflict.
<Source>.ErrorStatusModification (Function)
Returns the status of a record during a modification conflict.
<Source>.FreeQuery (Function)
Releases query resources (following use of HExecuteQuery or HExecuteSQLQuery functions).
HFreeQuery (Function)
Releases query resources (following use of HExecuteQuery or HExecuteSQLQuery functions).
HErrorModification (Function)
Allows you to:
  • return the value of a record item if a modification conflict occurs.
  • check if a modification conflict occurred.
ThreadResume (Function)
Resumes the execution of a thread that was interrupted by ThreadSuspend. Function not recommended.
CameraStatus (Function)
Returns the status of a Camera control.
AndroidiPhone/iPad Function kept for "Version-26-compatible" Camera controls.
Creating the Table pages of the WEBDEV RAD pattern
Creating the Relation windows of a WINDEV RAD pattern
How do I run a data file with a filter?
HLockRecNum (Function)
Locks a record and restricts the access to this record for all the other applications.
Creating the Relation pages of a WEBDEV RAD pattern
<Source>.Flush (Function)
Forces the operating system of the computer where the data files are found to write data onto the disk.
Creating the Table windows of the WINDEV RAD pattern
ThreadSuspend (Function)
Temporarily suspends the execution of the specified thread. Function not recommended.
HFlush (Function)
Forces the operating system of the computer where the data files are found to write data onto the disk.
Structure of log files (HFSQL Classic)
The following files are automatically created when logging an HFSQL Classic data file...
<Source>.LockRecNum (Function)
Locks a record and restricts the access to this record for all the other applications.
VideoStatus (Function)
Returns the status of a Camera control.
AndroidiPhone/iPad Function kept for "Version-26-compatible" Camera controls.
HRecordToXML (Function)
Retrieves the structure and the value of the current record and exports them into a character string in XML format.
dbgStartMemoryDiff (Function)
Starts a difference operation of the memory used by the application.
<Camera>.Status (Function)
Returns the status of a Camera control.
AndroidiPhone/iPad Function kept for "Version-26-compatible" Camera controls.
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...
HLinkMemo (Example)
Usage example of the HLinkMemo function
PhotoRunApp (Function)
Starts the native camera application of the device in order to take a photo.
<Source>.Seek (Function)
Positions on the first record of the data file whose value for a specific item is greater than or equal to a search value (generic search by default).
HCheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
SemanticSearch (Function)
Parcourt un index sémantique.
TableRecNum (Function)
Returns the number of the current record in a Table control based on a data file.
HSeekFirst (Function)
Positions on the first file record whose value for a specific item is greater than or equal to a sought value.
<Source>.SeekFirst (Function)
Positions on the first file record whose value for a specific item is greater than or equal to a sought value.
<Table>.RecNum (Function)
Returns the number of the current record in a Table control based on a data file.
<Source>.CheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
HForward (Function)
Moves several records forward from the current position in the data file, according to a specified item.
<Source>.Forward (Function)
Moves several records forward from the current position in the data file, according to a specified item.
CameraVideoStop (Function)
Stops the video recording previously started by CameraVideoStart.
ImageInfoModify (Function)
Modifies the value of an Exif tag for the image used.
HErrorDuplicates (Function)
Used to check whether a duplicate error occurred.
HErrorIntegrity (Function)
Used to check whether an integrity error occurred.
<Source>.RecordToXML (Function)
Retrieves the structure and the value of the current record and exports them into a character string in XML format.
HSeek (Function)
Positions on the first record of the data file whose value for a specific item is greater than or equal to a search value (generic search by default).
HLast (Function)
Sets the position on the last record of a data file according to a browse item.
<Source>.LinkMemo (Function)
Used to associate a file with a binary memo item or to cancel the existing link between a file and a binary item.
<Destination>.CopyRecord (Function)
Copies:
  • the content of the current record (loaded in memory) to the current data file record.
  • the content of the Record variable to the current data file record.
HRecNum (Function)
Returns:
  • the number of the current record in the HFSQL data file.
  • the number of the current record in the HFSQL view.
HReadLast (Example)
Usage example of the HReadLast function
<Source>.RecNum (Function)
Returns:
  • the number of the current record in the HFSQL data file.
  • the number of the current record in the HFSQL view.
Record (Variable type)
The Record type is used to save the values of a record.
XMLRename (Function)
Renames the current element (tag or attribute) in an XML document.
CameraVideoStart (Function)
Starts recording a video via a Camera control in an Android or iOS application.
<Source>.RestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): record in progress, filter, playback pointers.
iEndReport (Function)
Forces the report print to stop.
Creating the Vision windows of the WINDEV RAD pattern
fWriteLine (Example)
Usage example of the fWriteLine function
MemAdd (Function)
Adds an element to a memory area.
XMLModify (Function)
Modifies the content of the current element found in the XML document.
Report based on a programmed data source
In a report on a programmed data source, the reading of the records that will be displayed in the report requires full programming in WLanguage...
HRecordToString (Function)
Converts the content of the current record to string (in a data file, HFSQL view, query, etc.).
<Source>.RetrieveRecord (Function)
Returns the content of the current record (in a file, a view or a query, ...).
<Source>.Last (Function)
Sets the position on the last record of a data file according to a browse item.
<Table>.Save (Function)
Updates or adds the record bound to the current row in the Table or TreeView Table control.
<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.
HFound (Function)
Checks whether the current record corresponds to the current filter or search.
<Source>.Found (Function)
Checks whether the current record corresponds to the current filter or search.
HErrorLock (Function)
Used to check whether a lock error occurred.
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).
<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>.RecordToString (Function)
Converts the content of the current record to string (in a data file, HFSQL view, query, etc.).
HCopyRecord (Function)
Copies:
  • the content of the current record (loaded in memory) to the current data file record.
  • the content of the Record variable to the current data file record.
XMLInsertDocument (Function)
Inserts the current XML tag found in an XML document into another XML document.
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.
TableSave (Function)
Updates or adds the record bound to the current row in the Table or TreeView Table control.
XMLInsertElement (Function)
Inserts an XML element (tag or attribute) into an XML document.
<xmlDocument variable>.BuildString (Function)
Retrieves and formats the content of an XML document.
<Source>.Modify (Function)
Modifies the specified record or the record found in memory in the data file (query or view).
XMLDelete (Function)
Deletes the current element (as well as the entire branch) from an XML document.
HModify (Function)
Modifies the specified record or the record found in memory in the data file (query or view).
XMLAddAttribute (Function)
Adds an attribute into an XML document.
HSynchronizeReplica (Example)
Usage example of the HSynchronizeReplica function
HDeclareExternal (Example)
Usage example of the HDeclareExternal function
CameraRunApp (Function)
Starts the device's native camera application to record a video or to take a photo.
<Source>.SeekLast (Function)
Sets the position on the last file record whose value for a specific item is less than or equal to a sought value.
<Source>.ReadSeek (Function)
Sets the position on the first record whose value for a specific item is greater than or equal to a sought value (generic search).
Handling HTML text in an Edit control
WEBDEV allows you to manipulate text in HTML via the "HTML format" option of the Edit controls and the HTML control.
HSeekLast (Function)
Sets the position on the last file record whose value for a specific item is less than or equal to a sought value.
HReadSeek (Function)
Sets the position on the first record whose value for a specific item is greater than or equal to a sought value (generic search).
<Source>.ToPage (Function)
Automatically updates the controls of a page with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
XMLAddChild (Function)
Adds a child tag into an XML document.
HLinkMemo (Function)
Used to associate a file with a binary memo item or to cancel the existing link between a file and a binary item.
<Source>.Add (Function)
Adds:
  • the record found in memory into the data file (query or view).
  • the record found in a Record variable into the data file (query or view).
PageFromSource (Function)
Automatically updates the controls of a page with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
SourceToPage (Function)
Automatically updates the controls of a page with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
<Page>.FromSource (Function)
Automatically updates the controls of a page with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
dbgEndMemoryDiff (Function)
Saves a memory dump containing the memory resources that have been allocated and that have not been freed since the previous call to dbgStartMemoryDiff.
HReadFirst (Function)
Positions on the first file record according to a browse item.
<Element>.RequestRefreshUI (Function)
Requests the execution of the "Request for refreshing the display" event of the specified element (and gives back control without waiting for the execution of the event).
RequestRefreshUIElement (Function)
Requests the execution of the "Request for refreshing the display" event of the specified element (and gives back control without waiting for the execution of the event).
<Page>.FromFile (Function)
Automatically updates the controls of a page with:
  • the values of the bound items in the current record (loaded in memory) of the data file described in the data model editor. This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
  • the values of the bound WLanguage variables. This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
HSavePosition (Function)
Stores the current file context (current record, filter, pointers).
Report based on a memory area
A report based on a memory area is used to print the records stored in a memory area...
URIToBuffer (Function)
Loads in the background the content of a resource (image, text, etc.) identified by its URI in a buffer variable.
XMLBuildString (Function)
Retrieves and formats the content of an XML document (created by XMLDocument and modified by the XML functions).
RequestRefreshUI
Requests the execution of the "Request for refreshing the display" event (and gives back control without waiting for the execution of the event).
WindowFromSource (Function)
Automatically initializes the controls of a window with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
HReadSeekLast (Function)
Sets the position on the last record whose value for a specific item is less than or equal to a sought value (exact-match search).
<Source>.SavePosition (Function)
Stores the current context of a data file: current record, filter, read pointers.
<Source>.ToWindows (Function)
Automatically initializes the controls of a window with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
NotifPushEnable (Function)
Enables the management of push notifications in a WINDEV Mobile application (Android or iOS).
Creating the Vision pages of the WEBDEV RAD pattern
HRestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): record in progress, filter, playback pointers.
RequestUpdateUI (Function)
Requests the execution of the "Request for refreshing the display" event (and gives back control without waiting for the execution of the event). This function is kept for backward compatibility.
HFirst (Function)
Sets the position on the first record of a data file according to the specified browse item.
HFilter (Function)
Defines and enables a filter on a data file, view or query.
How do I run through a data file?
<Source>.Filter (Function)
Defines and enables a filter on a data file, view or query.
WLanguage procedure called by HWatch
WLanguage procedure called by HWatch
SourceToScreen (Function)
Automatically updates the controls in a window or page with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
HAdd (Function)
Adds:
  • the record found in memory into the data file (query or view).
  • the record found in a Record variable into the data file (query or view).
HReadSeekFirst (Function)
Sets the position on the first record whose value for a specific item is strictly equal to a sought value (exact-match search).
<Source>.ReadSeekFirst (Function)
Sets the position on the first record whose value for a specific item is strictly equal to a sought value (exact-match search).
<Window>.FromSource (Function)
Automatically initializes the controls of a window with:
  • the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor.
  • the values of the bound WLanguage variables.
HNext (Function)
Sets the position on the next data file record according to a browse item.
<Source>.Next (Function)
Sets the position on the next data file record according to a browse item.
HBackward (Function)
Moves backward several records from the current position in the data file, according to a specified item.
Creating the Form windows of a WINDEV RAD pattern
HPrevious (Function)
Sets the position on the previous record of the data file according to a browse item.
<Source>.Backward (Function)
Moves backward several records from the current position in the data file, according to a specified item.
<Source>.Previous (Function)
Sets the position on the previous record of the data file according to a browse item.
HCross (Function)
Crosses a record in a data file.
HRetrieveRecord (Function)
Returns the content of the current record (in a file, a view or a query, ...).
<Source>.Cross (Function)
Crosses a record in a data file.
Creating the Form pages of a WEBDEV RAD pattern
SQLCol (Function)
Retrieves the content of the specified column from the query result, for the current line.
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>.Write (Function)
Writes a record into a data file without updating the indexes corresponding to all keys used in the file.
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>.First (Function)
Sets the position on the first record of a data file according to the specified browse item.
Referring to an element in a WLanguage event / process
<Source>.Delete (Function)
Deletes a record from a data file (query or view).
SQLGetCol (Function)
Retrieves the content of the specified column from the query result, for the current line.
POUR TOUT/POUR ALL instruction (data file browsing)
Training FOR ALL instruction can be used to perform different types of runs...
HReadPrevious (Function)
Sets the position on the previous record of a file according to a browse item.
HModify (Example)
Usage example of the HModify function
<Source>.ReadPrevious (Function)
Sets the position on the previous record of a file according to a browse item.
HReadNext (Function)
Sets the position on the next data file record according to a browse item.
HReadLast (Function)
Sets the position on the last record of a data file according to a browse item.
<Source>.ReadLast (Function)
Sets the position on the last record of a data file according to a browse item.
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.
External language: Pascal programming
We are going to call the elements developed in WINDEV (project, windows, ...
<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.
MarkdownToHTML (Function)
Converts a Markwdown string to an HTML buffer (encoded in UTF-8).
HDuplicateRecord (Function)
Duplicates the record read in a data file: the record found in memory is added into the data file (query or view).
HOnError (Example)
Usage example of the HOnError function
WLanguage procedure called by CameraRunApp
WLanguage procedure ("callback") called when taking photos or recording videos via CameraRunApp.
<Image>.SaveJPEG (Function)
Saves an image:
  • in a JPEG file.
  • in memory.
WLanguage procedure called by CameraVideoStart
WLanguage procedure ("callback") called when the video recording is completed.
EmulateInfo (Function)
Emulates the next call to Info and automatically clicks the "OK" button.
fWrite (Example)
Usage example of the fWrite function
EmulateYesNo (Function)
Emulates the next call to YesNo and automatically clicks the button specified as parameter.
EmulateOKCancel (Function)
Emulates the next call to OKCancel and automatically clicks the button passed as parameter.
EmulateConfirm (Function)
Emulates the next call to Confirm and automatically clicks the button passed as parameter.
The RepeatString Looper control: Customized synchronization
How to manage the synchronization between:
  • the page displayed in the browser. This page contains a RepeatString Looper control displaying records from an HFSQL data file.
  • the corresponding page context found on the server.
Creating the menus for the pages of the WEBDEV RAD pattern
Defining specific character sets in HFSQL data files
When an application displays or saves data in HFSQL data files, this data is typed in the current language...
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