ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2025

Optimizing the query execution
The query editor allows you to optimize the execution speed of one or more queries...
Describing a query
Once a query is created, all the characteristics of this query can be modified at any time...
Example for creating a select query
This help page explains how to create two select queries...
Query creation mode: independent or embedded query
The query editor proposes two methods for creating a 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...
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Handling the versions of a window, report, query or project
When creating and developing the different elements of a project (window, query, report, project, ...
Operations in a Select query
The query editor allows you to perform operations on the values of an item...
Joins between the tables of a select query
When several tables are used in a query, the query editor automatically searches for the links between these tables described in the database schema...
Project comparator
Comparing two windows (two pages, two reports, two classes, ...
Creating an insert query
An insert query (corresponding SQL statement...
Creating a query
Two methods can be used to create a query...
Creating a select query
A select query (corresponding SQL statement...
Test of a query
The query editor allows you to run the test of query result...
Creating a combining query
A combining query (corresponding SQL statement: UNION) ...
Selection conditions of a query
The selection conditions of records are applied to the items used in the queries...
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...
Environment of the query editor
When creating a class in the code editor, the Constructor and Destructor methods are automatically created by default...
Items used in a select query
A query created in the query editor can contain several types of items...
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...
Tab order in a window, a page, etc.
The tab order of the controls found in a window or in a page describes the order in which the controls take focus in a window when the user presses the [Tabulation] key......
Using the Google Maps service
The Google Maps service is an Internet mapping software proposed by Google......
COMCallMethod (Function)
Runs a method of an interface of a COM object instantiated by COMCreateInstance.
Thread management constants
List of constants used by the functions for managing threads, critical sections, semaphores, mutexes, ......
HSeek (Function)
Positions on the first record of the data file whose value for a specific item is greater than or equal to a sought value (generic search by default).
HTransactionCancel (Function)
If a transaction is in progress, cancels all the operations performed on the data files in transaction since the start of transaction.
Constants for managing projects
List of constants used by the functions for managing projects....
zipExtractFile (Function)
Extracts a file from an archive and automatically decompresses it to a physical location or in memory.
HCreateView (Function)
Creates an HFSQL view. This function uses the former view mechanism....
Static Text control properties
List of properties associated with a Static Text control...
NULL values: Allowing nullable types
Starting with version 2024, you can allow nullable types in a WINDEV, WEBDEV or WINDEV Mobile project......
List,Get (External language)
Retrieves the value of a given element or the value of the selected element in a drop-down list or in an expanded list.
TableAddTitleHeader (Function)
Adds a column title-header into a Table or TreeView Table control in a window.
Importing DreamWeaver elements into a WEBDEV site
WEBDEV allows you to import Dreamweaver elements into your WEBDEV site......
Creating help pages
A help system includes several pages......
Trace (Function)
Displays the requested information (content of a control, for example) in a window opened next to the current window.
Choosing the type of image: dynamic, static, generated, ...
The images are often used to illustrate the site pages......
Transactions: Secure processes on HFSQL data files
This chapter presents the following topics......
Native xBase/FoxPro Access: Specific features and remarks
This help page presents the specific features regarding the programming of Native xBase/FoxPro Access......
Display modes, transparency and symmetry of an image
An image can be displayed in a window, a window control, a report control, a page control or a block according to several display modes....
The Layout control
The Layout control simplifies the implementation of dynamic UIs where controls are displayed and/or hidden programmatically......