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.
DiagramLoad (Function)
Loads a diagram into a Diagram variable from a ".wddiag" file, a memo or a binary buffer.
iPrintDiagram (Function)
Prints a diagram from: a Diagram Editor control, a "wddiag" file, a Diagram variable....
dClear (Function)
Clears the content of an Image variable or Image control and fills it with the specified color.
ServiceModify (Function)
... of the Service variable.
Dimension (Function)
Returns the size of a variable (string, numeric, array, ...) or resizes a dynamic array.
<HTML editor>.ToEmail (Function)
Exports the content of an HTML Editor control to an Email variable (to send the email).
JSONToTable (Function)
Populates a Table or TreeView Table control with the contents of a JSON string or variable.
UUID
The UUID keyword can correspond to: the UUID variable type. the UUID property....
<Table>.fromJSON (Function)
Populates a Table or TreeView Table control with the contents of a JSON string or variable.
HTMLEditorToEmail (Function)
Exports the content of an HTML Editor control to an Email variable (to send the email).
Handling a Progress Bar control through programming
A Progress Bar control can be handled through programming......
Handling Button controls programmatically
WINDEV, WINDEV Mobile and WEBDEV allow you to programmatically handle Button controls......
Error 20: The variable of the FOR loop should be a real
Error 108: The size of the variable is not allowed
Parameters of a procedure with a variable number of parameters
When the procedure uses a variable number of parameters, you must be able to handle the different...
Different types of data (Type of variable)
A variable is defined by name and type......
OAuth2Parameters (Type of variable)
The OAuth2Parameters type is used to define the information required to authenticate on a web...
emailPOP3Session (Type of variable)
The emailPOP3Session type is used to access a messaging server by using the POP3 protocol (Post...