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...
WLanguage types
The different types in WLanguage are...
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...
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.
<Connection variable>.DeleteTask (Function)
Deletes a scheduled task from an HFSQL Client/Server server....
<gglConnection variable>.ListCalendar (Function)
Retrieves the list of Google calendars associated with the specified Google account.
<PolygonGeo variable>.Touch (Function)
Determines whether a geographic polygon touches another geometry.
<WBAdminAuth variable>.ListConnection (Function)
Returns the list of current connections on a WEBDEV Application Server.
<emailIMAPSession variable>.CloseSession (Function)
Closes an IMAP session.
<zipArchive variable>.ExtractFileList (Function)
Extracts and decompresses a list of files found in an archive to a physical location.
<Document variable>.ToImage (Function)
Exports a page contained in a Document variable in image format.
<Document variable>.RedoCount (Function)
Returns the number of canceled actions that can be redone on a Document variable.
Handling a Looper control through programming
WINDEV, WINDEV Mobile and WEBDEV allow you to handle a Looper control by programming......
Handling a Navigation Bar control through programming
The Navigation Bar control can be handled by programming......
grDestinationImage (Function)
Defines an Image variable as destination of a chart.
VariantToJSON (Function)
Converts the content of a Variant variable to JSON.
JSONToVariant (Function)
Converts a JSON string to a Variant variable.
AppointmentReset (Function)
Reinitializes: the Appointment structure. the Appointment variable....
mlGetVariable (Function)
Retrieves the value of a variable for the MATLAB session.
mlSetVariable (Function)
Writes the value of a variable for the MATLAB session.
StringToJSON (Function)
Converts a JSON string into a JSON variable.
HTMLOpen (Function)
Creates an htmlDocument variable from an HTML document.
grSaveImage (Function)
Saves the image of a chart in an Image variable.
ContactReset (Function)
Reinitializes: the Contact structure. a Contact variable....
DiagramToImage (Function)
Exports a diagram to a variable of type Image.