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 WINDEV, WEBDEV AND WINDEV MOBILE

Version: 2026
<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.
Assignment of RETURN
The return value of the process currently run can be assigned...
HErrorStatusModification (Function)
Returns the status of a record during a modification conflict.
HFreeQuery (Function)
Releases query resources (following use of HExecuteQuery or HExecuteSQLQuery functions).
<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).
HErrorModification (Function)
Allows you to:
  • return the value of a record item if a modification conflict occurs.
  • check if a modification conflict occurred.
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
ThreadResume (Function)
Resumes the execution of a thread that was interrupted by ThreadSuspend. Function not recommended.
How do I run a data file with a filter?
Creating the Relation pages of a WEBDEV RAD pattern
HFlush (Function)
Forces the operating system of the computer where the data files are found to write data onto the disk.
<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.
HLockRecNum (Function)
Locks a record and restricts the access to this record for all the other applications.
<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.
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...
Structure of log files (HFSQL Classic)
The following files are automatically created when logging an HFSQL Classic data file...
PhotoRunApp (Function)
Starts the native camera application of the device in order to take a photo.
<Source>.Seek (Function)
Sets the position 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).
<Table>.RecNum (Function)
Returns the number of the current record in a Table control based on a data file.
HLinkMemo (Example)
Usage example of the HLinkMemo function
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.
HCheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
<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.
CameraVideoStart (Function)
Starts recording a video via a Camera control in an Android or iOS application.
HErrorIntegrity (Function)
Used to check whether an integrity error occurred.
HSeek (Function)
Sets the position 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).
HErrorDuplicates (Function)
Used to check whether a duplicate error occurred.
<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
Creating the Vision windows of the WINDEV RAD pattern
fWriteLine (Example)
fWriteLine example
<Source>.RestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): record in progress, filter, playback pointers.
Record (Variable type)
The Record type is used to save the values of a record.
iEndReport (Function)
Forces the report print to stop.
MemAdd (Function)
Adds an element to a memory area.
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...
<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.
<Table>.Save (Function)
Updates or adds the record bound to the current row in the Table or TreeView Table control.
HErrorLock (Function)
Used to check whether a lock error occurred.
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.
<Source>.RecordToString (Function)
Converts the content of the current record to string (in a data file, HFSQL view, query, etc.).
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).
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.
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.
TableSave (Function)
Updates or adds the record bound to the current row in the Table or TreeView Table control.
HModify (Function)
Modifies the specified record or the record found in memory in the data file (query or view).
<Source>.Modify (Function)
Modifies the specified record or the record found in memory in the data file (query or view).
<Source>.RetrieveRecord (Function)
Returns the content of the current record (in a file, a view or a query, ...).
HRecordToString (Function)
Converts the content of the current record to string (in a data file, HFSQL view, query, etc.).
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.
HSynchronizeReplica (Example)
Usage example of the HSynchronizeReplica function
<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.
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.
<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).
HRestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): record in progress, filter, playback pointers.
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.
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.
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.
<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.
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).
<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).
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.
HSavePosition (Function)
Stores the current file context (current record, filter, pointers).
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.
HReadSeekLast (Function)
Sets the position on the last record whose value for a specific item is less than or equal to the search value (exact-match search).
<Source>.ReadSeekLast (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.
<Source>.ReadSeek (Function)
Sets the position on the first record of the data file whose value for a specific item is greater than or equal to the search value (generic search).
HReadSeek (Function)
Sets the position on the first record of the data file whose value for a specific item is greater than or equal to the search value (generic search).
RequestRefreshUI
Requests the execution of the "Request for refreshing the display" event (and gives back control without waiting for the execution of the event).
CameraRunApp (Function)
Starts the device's native camera application to record a video or to take a photo.
Creating the Vision pages of the WEBDEV RAD pattern
NotifPushEnable (Function)
Enables the management of push notifications in a WINDEV Mobile application (Android or iOS).
<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.
Referring to an element in a WLanguage event / process
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.
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.
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.
HReadSeekFirst (Function)
Sets the position on the first record whose value for a specific item matches exactly the search 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.
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
<Source>.Backward (Function)
Moves backward several records from the current position in the data file, according to a specified 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.
HDelete (Function)
Deletes a record from a data file (query or view).
<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.
HReadPrevious (Function)
Sets the position on the previous record of a file according to a browse item.
<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.
HViewToFile (Example)
Example of function use HViewToFile
HModify (Example)
Usage example of the HModify function
External language: Pascal programming
We are going to call the elements developed in WINDEV (project, windows, ...
WLanguage procedure called by CameraRunApp
WLanguage procedure ("callback") called when taking photos or recording videos via CameraRunApp.
<Source>.Watch (Function)
Starts monitoring 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.
HWatch (Function)
Starts monitoring 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.
HOnError (Example)
Usage example of the HOnError function
HDescribeFile (Function)
Describes a data file programmatically.
<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.
MarkdownToHTML (Function)
Converts a Markwdown string to an HTML buffer (encoded in UTF-8).
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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