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...
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.
Assignment operators
Three assignment operators are available...
WLanguage types
The different types in WLanguage are...
Constant
The constants are language elements whose value is fixed once and for all...
<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.
<Source>.Add (Function)
... variable into the table (query or view).
Passing parameters
The parameters can be passed to a procedure......
Manipulating an HTML Display control in the code
The HTML Display control is used to display a Web page in an application......
Linking a Scheduler control to a data file or variable
You can create Scheduler controls directly linked to the data....
Error 101: Declaration of global variable not allowed
TmeLine control linked to a data file or variable
You can create TimeLine controls directly linked to the data....
FOR EACH/FOR ALL statement (loop through a variable of type XMLReader)
The FOR EACH statement loops through a variable of type xmlReader in various ways: Loop...
<emailPOP3Session variable>.NbMessage (Function)
Returns the number of incoming messages on the email server (POP3 protocol only).
<emailPOP3Session variable>.StartSession (Function)
Starts a POP3 session.
Organizer control linked to a data file or to a variable
You have the ability to create Organizer controls linked to data....
<EmailPOP3Session variable>.GetAll (Function)
Retrieves all the emails found on a POP3 server.
Keyboard Variable (Using physical keyboards on Android)
The Keyboard variable makes it possible to retrieve the parameters of the events of a physical...
<emailPOP3Session variable>.CloseSession (Function)
Closes a POP3 session.
<Linestring2D variable>.AddPoint (Function)
Adds a new point to a 2D linestring.
<Polygon2D variable>.IsValid (Function)
Checks whether the specified 2D polygon is valid according to the OGC rules.
<Polygon2D variable>.SerializeWKT (Function)
Serializes a 2D polygon using the Well-Known Text (WKT) format.
<Polygon2D variable>.ConvexHull (Function)
Calculates the convex hull of the specified 2D polygon.
<Polygon2D variable>.Cover (Function)
Determines if geometry A (of type 2D polygon) covers geometry B.