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)...
Advanced types
The advanced types of WLanguage are as follows
<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.
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.
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.
Assignment operators
Three assignment operators are available...
Code style
A code style is used to automatically prefix the name of all the variables and project elements (windows, report controls, classes, etc.
TypeVar (Function)
Identifies the type of an expression, a variable (during a call to a procedure for example) or a control.
Constant
The constants are language elements whose value is fixed once and for all...
Checkers available in the code editor
The code editor proposes several tools used to correct the code...
Type inference
The type inference is used to simplify the declaration of variables when the variable type can be automatically deduced by the compiler...
DocSelect (Function)
Selects a fragment in a Word Processing control.
BeaconDetectPrecise (Function)
Used to find the Beacons near the device.
<Image>.DrawRectangleGradient (Function)
Draws a rectangle in an Image control.
<Image>.PixelOpacity (Function)
Identifies the opacity of a pixel in an image (in an Image control) with an Alpha channel.
PVTInfoXY (Function)
Returns the values of headers corresponding to a position in a Pivot Table control in pixels.
<Image>.Rotation (Function)
Rotates an Image control.
<Image>.EndDrawing (Function)
Deletes all the drawings made since the last call to dStartDrawing.
<Image>.StartDrawing (Function)
Indicates that the drawing functions that will be used are intended for the specified Image...
<Image>.HorizontalSymmetry (Function)
Flips an image in an Image control with respect to a horizontal axis (symmetry with respect...
<Image>.VerticalSymmetry (Function)
Flips an image contained in an Image control with respect to a vertical axis (symmetry with respect...
ModbusDisconnect (Function)
Closes the Modbus session.
ModbusWriteRegister (Function)
Writes one or more registers (16-bit values) to a Modbus slave, starting at a specific address.
ModbusReadRegister (Function)
Reads one or more registers from a Modbus slave, starting at a specific address.
<Source>.InfoFile (Function)
Returns the characteristics of an HFSQL Classic or Client/Server data file....
PDFReaderGoToBookmark (Function)
Sets the position directly on the desired bookmark in the PDF document.
DiagramStartModification (Function)
Indicates the start of a series of actions performed in a Diagram document in a single event...
DiagramEndModification (Function)
Indicates the end of a series of actions performed in a Diagram document in a single event...
fWrite (Function)
Writes: a character string into an external file. a memory section....
CertificateExtract (Function)
Extracts a certificate from a signature buffer or from a print duplicate.
DocPrint (Function)
Prints a document in "docx" format.
DocToHTML (Function)
Converts a Word Processing document into an HTML file.
iCalendarToAppointment (Function)
Lists the appointments described in a character string in iCalendar format.
DocEndModification (Function)
Signals the end of grouping for a set of operations in a single event (management of "undo/redo")....
<Map>.ModifyMarker (Function)
Modifies a marker displayed in a Map control.
zipOpenRAR (Function)
Opens an existing archive in RAR format.