ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2026

Declaring and using a variable
A variable is defined by name and type...
Service variable
The Service variable is used to...
Report based on a variable (Data binding)
A report based on a variable is used to directly print the information found in a WLanguage variable...
Composite variable
A composite variable contains different types of elements (members)...
TypeVar (Function)
Identifies the type of an expression, a variable (during a call to a procedure for example) or a control.
Advanced types
The advanced types of WLanguage are as follows
Checkers available in the code editor
The code editor proposes several tools used to correct the code...
Constant
The constants are language elements whose value is fixed once and for all...
IsNumeric (Function)
Enables you to find out whether a variable or a control is:
  • a numeric (integer, real, currency or numeric).
  • a string that can be converted into numeric.
WLanguage types
The different types in WLanguage are...
Assignment operators
Three assignment operators are available...
<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.
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.
Type inference
The type inference is used to simplify the declaration of variables when the variable type can be automatically deduced by the compiler...
Code style
A code style is used to automatically prefix the name of all the variables and project elements (windows, report controls, classes, etc.
<httpRequest variable>.WriteCookie (Function)
Adds or modifies a cookie in an HTTP request.
<Connection variable>.DeleteDirectory (Function)
Deletes a directory from an HFSQL Client/Server database....
<zipArchive variable>.ExtractAll (Function)
Extracts all files from an archive and decompresses them.
<Connection variable>.InfoServerRights (Function)
Gets the rights granted to a user or group of users on a server.
<sfConnection variable>.ExecuteQuery (Function)
Runs an SOQL query (Salesforce Object Query Language) on a Salesforce database.
<Queue variable>.Dequeue (Function)
Removes an element from the queue.
<Connection variable>.ManageTask (Function)
Enables or disables a scheduled task on an HFSQL Client/Server server....
JSON variable manipulation functions
Envoie une requête HTTP en mode asynchrone : le programme continue de s'exécuter et la réponse est...
<picLayer variable>.DrawPolyline (Function)
Draws a line composed of multiple segments.
<Queue variable>.Info (Function)
Retrieves the characteristics of a queue: types of elements and number of elements.
<hdfsConnection variable>.CopyFrom (Function)
Copies a file found on a Hadoop server to the local computer.
Data Source (Variable type)
A Data Source variable is used to describe a temporary data source (query, view, alias, etc.).
<Connection variable>.NotifDeleteEmailRecipient (Function)
Deletes the recipients of an email notification.
<upnpDevice variable>.GetVolume (Function)
Retrieves the volume of a UPnP device.
<PolygonGeo variable>.ConvexHull (Function)
Calculates the convex hull of the specified geographic polygon.
<Image variable>.DrawCircle (Function)
Draws a circle or an ellipse in an Image variable.
<Diagram variable>.ToSVG (Function)
Exports a diagram to an SVG image.
<btleDevice variable>.Disconnect (Function)
Used to disconnect from a Bluetooth Low Energy device.
<Document variable>.Replace (Function)
... variable.
<Image variable>.SaveJPEG (Function)
Saves an image found in an Image variable: in a JPEG file. in memory....
<mongoCollection variable>.DeleteAll (Function)
Deletes all the documents (corresponding to the specified filter) from a collection of a MongoDB...
<mongoGridFS variable>.GetFile (Function)
Retrieves (on the local computer) a file identified by its name and found in a MongoDB file system.
<upnpService variable>.ExecuteAction (Function)
Runs an action on the UPnP service.
<Connection variable>.DeleteLink (Function)
Deletes an integrity rule between two tables on the server.
<Document variable>.ToText (Function)
Creates a character string with the data of a Document variable.