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.
Unalterable (Property)
The property Unalterable property is used to set the inalterability of a table: the table...
geoRunApp (Function)
Starts the device's native maps application to display: a specific geographical location,...
Printing a watermark text
A report (and a duplicate copy) can include an additional text in the format of a watermark,...
AppServerListScheduledTask (Function)
Returns the list of scheduled tasks for the application (site or Webservice).
<Map>.GetPosition (Function)
Returns the geographical position of the point located in the center of the map currently displayed...
Secret string vault
Passwords, private keys and tokens are often used in programming......
HDeleteQuery (Function)
Deletes a query (used by stored procedures) from an HFSQL server.
TimeDifference (Function)
Calculates the difference between two times in hundredths of a second.
AppServerDeleteScheduledTask (Function)
Deletes a scheduled task associated with the application (site or Webservice).
UPNPFindDevice (Function)
Finds a device based on its unique name (UDN).
WLanguageCodeFormat (Function)
Formats WLanguage code: coloring, normalized rewriting, indentation, translation, etc.
ComponentExecute (Function)
Executes a global procedure present in an external component. This external component is loaded...
BTLECharacteristicWriteValue (Function)
Writes a value to a characteristic on a Bluetooth Low Energy device.
Handling a Radio Button control programmatically
WINDEV, WEBDEV and WINDEV Mobile allow you to programmatically handle Radio Button controls......
AppointmentModify (Function)
Modifies the current appointment: in a Lotus Notes or Outlook calendar. in the calendar found...
BTLECharacteristicReadValue (Function)
Reads the value of a characteristic on a Bluetooth Low Energy device.
Server triggers
Server triggers are stored procedures executed by the server before or after a write operation...
ContactAdd (Function)
Adds a contact: in a Lotus Notes or Outlook address book. into the list of contacts...
<Image>.Straighten (Function)
Transforms an image by applying perspective correction.
dStraighten (Function)
Transforms an image by applying perspective correction.
dModifyOpacity (Function)
Modifies the opacity of an image (which means the alpha channel of the image).