ONLINE HELP
 WINDEV, WEBDEV AND WINDEV MOBILE

Version: 2026
fWriteLine (Example)
Usage example of the fWriteLine function
Error
The Error keyword is used to manage the errors.
HAdd (Example)
Usage example of the HAdd function
ModbusReadBit (Function)
Reads one or more bits from a Modbus slave, starting at a specific address.
<modbusSession>.ReadBit (Function)
Reads one or more bits from a Modbus slave, starting at a specific address.
HErrorDuplicates (Function)
Used to check whether a duplicate error occurred.
HOnError (Example)
Usage example of the HOnError function
HErrorLock (Function)
Used to check whether a lock error occurred.
XamlProperty (Function)
Used to find out and modify the value of a .Net property for an Xaml control or for a Carousel control.
<XAML>.Property (Function)
Allows you to find out and modify the value of a .Net property for an Xaml control or for a Carousel control.
ExceptionChangeParameter (Function)
Configures the automatic behavior that will be implemented if an exception occurs in the current process.
Automatic management of exceptions
The management of exceptions can be customized by process...
HPass (Function)
Defines the password used to create or open a data file.
fMerge (Function)
Merges several files into a single one.
Error (External language)
Displays a dialog box containing an error logo and the message passed as parameter.
zipMsgError (Function)
Returns the message associated with an error code on an archive.
ModbusReadRegister (Function)
Reads one or more registers from a Modbus slave, starting at a specific address.
SMSSend (Function)
Sends an SMS.
<modbusSession>.ReadRegister (Function)
Reads one or more registers from a Modbus slave, starting at a specific address.
J2EERun (Function)
Runs a procedure on a server of J2EE XML web services.
J2EEGetResult (Function)
Returns the result of the last J2EE procedure that was successfully run.
fSplit (Function)
Splits a file into several files.
<Source>.Password (Function)
Defines the password used to create or open a data file.
Library,Error (External language)
Loads the file that contains the error messages handled by WD??EXE.DLL in the desired language.
General exception mechanism
A process of general exception is available for all the components of the object with which it is associated...
Month (Property)
The Month property is used to:
  • Retrieve the month from a Date or DateTime variable.
  • Modify the month in a Date or DateTime variable.
  • Retrieve the month from a Date item (in "Simple date" or "Date and Time" format)
  • Modify the month in a Date item (in "Simple Date" or "Date and Time" format)
iParameterDuplicate (Function)
Configures the automatic creation of the duplicate copy generated during the next print.
HTTPGetResult (Function)
Retrieves the result or the header of last HTTP request run.
Day (Property)
The Day property is used to:
  • Get the day from a Date or DateTime variable, or get the number of days from a Duration variable.
  • Change the day of a Date or DateTime variable, or change the number of days of a Duration variable.
  • Get the day or the number of days from a Date item (in "Date", "Date and Time" or "Duration" format)
  • Modify the day or the number of days in a Date item (in "Date", "Date and Time" or "Duration" format)
ExceptionInfo (Function)
Retrieves information about the current exception.
Screen,FileToScreen (External language)
Updates the controls in the window with the values from the bound items in the data file.
ErrorInfo (Function)
Retrieves information about the last error that occurred in a function of a WINDEV, WINDEV Mobile or WEBDEV component.
fSeek (Example)
Usage example of the fSeek function
ModbusDisconnect (Function)
Closes the Modbus session.
PhotoRunApp (Function)
Starts the native camera application of the device in order to take a photo.
External language: Pascal programming
We are going to call the elements developed in WINDEV (project, windows, ...
Sending and receiving emails
WINDEV, WEBDEV and WINDEV Mobile allow you to directly manage the emails from your applications...
<modbusSession>.Disconnect (Function)
Closes the Modbus session.
Example of video management (transmitted by a Camera control) (prefix syntax)
In this example, the application allows you to...
Example for managing videos (broadcasted by a Camera control)
In this example, the application allows you to...
fWrite (Example)
Usage example of the fWrite function
AppServerAddScheduledTask (Function)
Adds a new scheduled task to the application (site or webservice).
EndService (Function)
Ends the execution of the current service.
SQLTable (Function)
Transfers the result of a query to a Table control populated programmatically (a List Box or Combo Box control), with the possibility of Partial Fetch (the result is retrieved by blocks of rows).
DomoOpen (Function)
Used to establish a connection with a X10 interface.
SOAPError (Function)
Returns the error of the last SOAP procedure that failed.
EmailStartIMAPSession (Function)
Starts a session for receiving and reading emails with the IMAP protocol.
HErrorIntegrity (Function)
Used to check whether an integrity error occurred.
Managing Hive databases
Hive is a software layer of Hadoop used to run queries...
GPSGetPosition (Function)
Retrieves information about the current device position.
zipOpenCAB (Function)
Opens an existing archive in CAB format.
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.
<modbusSession>.WriteRegister (Function)
Writes one or more registers (16-bit values) to a Modbus slave, starting at a specific address.
CertificateClientInfo (Function)
Returns information about the certificate used by the client computer.
HModifyStructure (Example)
Usage example of the HModifyStructure function
ControlError (Function)
Customizes the value displayed in the controls when the value cannot be displayed.
EmailCheckAddress (Function)
Checks the validity of an email address.
SQLNext (Function)
Positions on the next row of the query result.
ModbusConnectTCP (Function)
Connects a client to a Modbus server via transmission control protocol (TCP).
fTempPath (Example)
Usage example of the fTempPath function
SQLPrevious (Function)
Positions on the previous row of the query result.
ModbusConnectRTU (Function)
Connects a client to a Modbus slave via a serial port.
CertificateSignExecutable (Function)
Signs an executable file with a certificate.
<zipArchive variable>.Exist (Function)
Determines whether an archive exists.
zipOpen (Function)
Opens an existing archive.
SQLTransaction (Example)
Usage example of the SQLTransaction function
geoTrackingEnable (Function)
Enables the management of location tracking in a WINDEV Mobile application.
Reintegrating translated text into a project
Once the translation of framework libraries ("...
fDateTime (Example)
Usage example of the fDateTime function
ErrorPropagate (Function)
Propagates a non-fatal error that can be processed by the calling code if the management of non-fatal errors was enabled for this code (in the code editor or by ErrorChangeParameter).
HDeclareExternal (Function)
Temporarily imports into the current analysis the description of a data file from an existing HFSQL data file.
Managing emails with "Simple MAPI"
Simple MAPI simplifies the management of emails received by the hosting provider...
EmailStartSession (Function)
Starts an email management session based on the selected management mode (POP3, SMTP, IMAP or MS Exchange).
fSelect (Example)
Usage example of the fSelect function
CameraRunApp (Function)
Starts the device's native camera application to record a video or to take a photo.
emailSMTPSession (Variable type)
The emailSMTPSession type is used to access a messaging server by using the SMTP protocol (Simple Mail Transfer Protocol) in order to send emails.
TestWriteResult (Function)
Writes information or an error into the status report of a unit test, in the test editor.
SQLLast (Function)
Sets the position on the last row of the query result.
InfoThumbnailGeneration (Property)
The InfoThumbnailGeneration property is used to determine if the thumbnails of an item have been generated successfully.
MacOS - Developing an application in Catalyst mode
Apple has recently released an SDK to natively compile iOS applications for MacOS...
zipOpenRAR (Function)
Opens an existing archive in RAR format.
<modbusSession>.WriteBit (Function)
Writes one or multiple bits to a specific address in a Modbus slave.
ModbusWriteRegister (Function)
Writes one or more registers (16-bit values) to a Modbus slave, starting at a specific address.
HTTPRequest (Function)
Starts an HTTP request on a server.
Creating the Relation pages of a WEBDEV RAD pattern
ModbusWriteBit (Function)
Writes one or multiple bits to a specific address in a Modbus slave.
<zipArchive variable>.OpenRAR (Function)
Opens an existing archive in RAR format.
MatError (Function)
Identifies the type of the last error caused by a Matxxx function (functions for matrix management).
zipExist (Function)
Determines whether an archive exists.
CommandLine (Function)
Identifies and retrieves the different elements of the command line passed as a parameter to the current program.
"END:" label
The END: label is used to define a code that will be systematically run at the end of process execution.
modbusSession (Variable type)
The modbusSession type is used to identify a connection to a Modbus server.
SQLFirst (Function)
Positions on the first row of the query result.
EmulateError (Function)
Emulates the next call to Error and automatically clicks the "OK" button.
Translating a text file with WDTRAD
SQLAssociate (Function)
Automatically associates each column of the query result with a control or with a variable of the application.
WLanguage procedure called by zipAddDirectory
WLanguage procedure ("Callback") called when adding files with zipAddDirectory.
XMLSave (Function)
Saves an XML document in a file.
BarCodes (Variable type)
The BarCodes type is used to handle the information found in a bar code.
ErrorChangeParameter (Function)
Configures the automatic behavior that will be implemented if an error occurs in the current process.
tapiListen (Function)
Starts the call detection (also called "call monitoring service").
<xmlDocument variable>.Save (Function)
Saves an XML document in a file.
NotifPushEnable (Function)
Enables the management of push notifications in a WINDEV Mobile application (Android or iOS).
gpwAddUserToGroup (Function)
Adds a user to a group of the User Groupware database.
External language: Programming in Fortran
We are going to call the elements developed in WINDEV (project, windows, analysis, ...
DDEError (Function)
Returns the runtime status report of a DDE function.
Stored procedures and queries (HFSQL Client/Server)
The stored procedures are used to simplify the development and the maintenance of your applications by factorizing the code...
CDEject (Function)
Opens or closes the door of CD/DVD player selected on the current computer.
WLanguage procedure called by zipAddDirectory to handle the progress bar
WLanguage procedure ("Callback") used by zipAddDirectory to manage the progress of files being added to the archive.
HErrorInfo (Function)
Returns a detailed information about the last error triggered by the HFSQL engine.
BurnerVolumeName (Function)
Allows you to find out or modify the name of the CD or DVD to burn.
BurnerEject (Function)
Opens or closes the door of the current burner.
SpreadsheetSave (Function)
Saves the content of a Spreadsheet control in a file in XLSX format.
<Spreadsheet>.Save (Function)
Saves the content of a Spreadsheet control in a file in XLSX format.
SQLConnect (Example)
Usage example of the SQLConnect function
Creating the Table pages of the WEBDEV RAD pattern
Creating the Form pages of a WEBDEV RAD pattern
CertificateSignString (Function)
Creates the signature of a character string.
appServerScheduledTask (Variable type)
The appServerScheduledTask type is used to manage a scheduled task of WEBDEV Application Server through programming (for a site or a web service).
Telephony: Managing incoming calls
The management of the incoming calls is performed in a specific "thread".
Error (Function)
Displays a custom error message in a system error window.
HOnError (Function)
Customizes the management of HFSQL errors.
WLanguage procedure called by HashCheckString
Procedure ("Callback") called by HashCheckString when checking the hash algorithm.
ConsoleError (Function)
Writes a character string in the standard error output stream "stderr".
Menus and menu options: Tips & Tricks
This page presents some operations specific to the menus and to the menu options...
CertificateCheckString (Function)
Checks the correspondence between a signature and a string.
PanelActivate (Function)
Activates a panel when several panels are docked together.
WLanguage procedure called by CameraPhoto
WLanguage procedure ("callback") called when the photo is saved via CaméraPhoto.
<Dockable panel>.Activate (Function)
Activates a panel when several panels are docked together.
SNMPStringToOID (Function)
Converts an OID from its text representation to its numeric representation.
WLanguage procedure called by CameraRunApp
WLanguage procedure ("callback") called when taking photos or recording videos via CameraRunApp.
WLanguage procedure called by AppleSignIn
Procedure ("Callback") called by AppleSignIn when the Apple authentication result is obtained.
gpwResetPassword (Function)
Resets the password of a registered user.
WLanguage procedure called by CameraVideoStart
WLanguage procedure ("callback") called when the video recording is completed.
H.ErrIgnore (Variable)
Specifies the mode for processing the errors:
  • the errors are processed by WINDEV
  • the errors are processed by the program.
J2EEError (Function)
Returns the error for the last J2EE procedure that failed.
WLanguage procedure called by inAppRestorePurchases
Procedure ("Callback") called by inAppRestorePurchases when a purchase is restored.
SNMPOIDDescription (Function)
Returns the description of an OID.
inAppRestorePurchases (Function)
Restores the purchases of non-consumable products previously performed by the user in an iOS application.
Parameters of the procedure used by fReadLine
WLanguage procedure ("Callback") called by fReadLine for each line read in the file.
Difference of behavior in Windows Vista (and later)
The test of your project was run using one of the Vista/7 test options...
SNMPOIDToString (Function)
Converts an OID from its numeric representation to its text representation.
SNMPOIDStatus (Function)
Returns the status of an OID.
zipAddDirectory (Function)
Adds all the files found in a directory and in its subdirectories into an archive and compresses them.
GroupReset (Function)
Reinitializes the Group structure.
SocketCreateInfrared (Function)
Creates a socket that uses the infrared port.
WDModFic: Tool for automatic modification of data files
WDModFic is a tool for automated modification of data files on development and end-user workstations...
SNMPOIDAccess (Function)
Returns the authorized access modes of a specific OID.
GroupAdd (Function)
Adds a group of contacts in a Lotus Notes or Outlook address book.
DotNetError (Function)
Returns the error for the last .Net procedure that failed.
<zipArchive variable>.OpenCAB (Function)
Opens an existing archive in CAB format.
AppleSignIn (Function)
Used to implement authentication via "Sign In with Apple" on devices running on iOS 13 and higher.
HExecuteSQLQueryAsynchronous (Function)
Executes an SQL query asynchronously.
<Source>.ExecuteSQLQueryAsynchronous (Function)
Executes an SQL query asynchronously.
BurnerCancel (Function)
Cancels the current burn process.
Hasp (Function)
Interrogates an electronic HASP key (HASP-3, HASP-4, MemoHasp or NetHasp).
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