ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2026

Creating a delete query
A delete query (corresponding SQL statement...
HSuggestKey (Function)
Returns a list of keys to add to data files to improve query performance.
Operations in a Select query
The query editor allows you to perform operations on the values of an item...
Selection conditions of a query
The selection conditions of records are applied to the items used in the queries...
HSuggestKeyEnd (Function)
Finishes collecting information on executed queries.
Project comparator
Comparing two windows (two pages, two reports, two classes, ...
Creating a query
Two methods can be used to create a query...
Items used in a select query
A query created in the query editor can contain several types of items...
Sort order of records found in a select query
To make the result of a query easier to read, the records can be sorted according to one or more items...
Handling the versions of a window, report, query or project
When creating and developing the different elements of a project (window, query, report, project, ...
Create an insert query
An insert query (corresponding SQL statement...
Carrying over the differences from an element to another one
The project comparator is used to compare two elements and to list the differences found...
Joins between the data files of a select query
When several data files are used in a query, the query editor automatically searches for the links between these files defined in the analysis...
Code history
The code history is used to...
Environment of the query editor
Creating a select query
A select query (corresponding SQL statement...
Query creation mode: independent or embedded query
The query editor proposes two methods for creating a query...
HSuggestKeyStart (Function)
Starts collecting information on executed queries.
Describing a query
Once a query is created, all the characteristics of this query can be modified at any time...
Optimizing the query execution
The query editor allows you to optimize the execution speed of one or more queries...
Select query description window
The description window of a select query includes several sections...
Creating a combining query
A combining query (corresponding SQL statement: UNION) ...
Example for creating a select query
This help page explains how to create two select queries...
Modifying the values displayed in the result of a select query
In the result of a select query, you have the ability to only display...
Test of a query
The query editor allows you to run the test of query result...
Select query: Displaying the first/last n records
The editor of Select queries is used to limit the number of records that will be displayed in the result of the query.
Query: Displaying the records corresponding to a given period
When a "Date" item is found in the query, you have the ability to only select the records corresponding to a given period...
Creating an update query
An Update query (SQL UPDATE statement) is used to modify the records in a database file...
Result of a query in test mode
After its execution in test mode (see Running the query test), the result of the query can be...
iImageWidth (Function)
Calculates the width of the image to print (in millimeters).
ControlVisible (Function)
Makes a control (or a group of controls) visible in a window. During this operation, an animation can be performed on the controls.
BTAcceptConnection (Function)
Used to find out whether a Bluetooth radio accepts (or not) the requests for connection coming from the devices.
XMLWrite (Function)
Creates or modifies the value of an XML element or the value of the attribute for an XML element.
OrganizerDeleteAll (Function)
Deletes all the appointments from an Organizer control.
OrganizerPosition (Function)
Displays an Organizer control from a specified date or returns the date of the first day (or the date of the last day) displayed in an Organizer control.
fMakeDir (Function)
Creates a directory (and the intermediate directories if necessary).
fCopyDir (Function)
Copies the contents of a directory and its subdirectories.
Length (Function)
Returns: the length of a string, i.e., the number of characters in the string (including spaces and binary zeros). the size of a buffer, i.e., the number of bytes in the buffer....
ListSelectCount (Function)
Returns the number of elements selected in a List Box, ListView or Combo Box control.
iPageHeight (Function)
Calculates the height of printable page (in millimeters) while taking the top or bottom margins into account.
iImageHeight (Function)
Calculates the height of the image to print (in millimeters).
Starting WDOptimizer in a command line
iPageWidth (Function)
Calculates the width (in millimeters) of the printable page while taking the left or right margins into account.
iTextWidth (Function)
Calculates the width (in millimeters) of the text to print, according to the specified font.
Validity period of site pages
When creating a page, a validity period can be defined for this page......
Events associated with the Map control
WINDEV, WINDEV Mobile and WEBDEV manage the following events by default (order of appearance in the code editor)...
Android application: Using and sharing SQLite data
For the Android applications, the available databases are HFSQL (Classic and Client/Server) and SQLite....
Display modes of Tab control
To optimize the style of your tabs, you have the ability to use images and colors......
Creating a skin template from an existing skin template
You can create a skin template from an existing skin template (provided by PC SOFT, for example)......
The Radio Button control
The Radio Button control is a control allowing the user to select an option among several ones......
Managing the automatic identifiers when adding a record
When adding a record into a HyperFileSQL file (HAdd), three management modes are available for the automatic identifiers......
URI (Type of variable)
The URI (Uniform Resource Identifier) type identifies physical or abstract resources (e.g. files or Web pages).
Sharing your source code with the SCM
WINDEV Tutorial - An SCM for WINDEV Sharing your source code with the SCM - 30 min
fReadLine (Function)
Reads a line from an external file (ANSI or UNICODE).