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...
EmailDeleteMessage (Example)
Usage example of the EmailDeleteMessage function
fDriveInfo (Function)
Returns information about a drive.
HCloseAnalysis (Function)
Closes the current analysis.
EmailCloseSession (Example)
Usage example of the EmailCloseSession function
HCancelDeclaration (Example)
Usage example of the HCancelDeclaration function
HDeclareExternal (Example)
Usage example of the HDeclareExternal function
SelectColor (Function)
Opens the standard window for color selection and selects the specified color.
fChangeSize (Function)
Resizes an external file.
SysColor (Function)
Identifies or modifies the color of a Windows element.
Clipboard (Function)
Retrieves the text or image found in the system clipboard.
fTime (Function)
Returns or modifies the different times associated with a file or directory (date created, modified or accessed).
Null (Property)
The Null property is used to: Assign NULL to the item for the current record. Find out whether the item is associated with the NULL value for the current record. Define the default value of an item when the item is described through programming....
SocketCreate (Function)
Creates a socket.
fWrite (Function)
Writes: a character string into an external file. a memory section....
fAttribute (Example)
Usage example of the fAttribute function
Native MySQL Connector for WINDEV and WEBDEV
WINDEV and WEBDEV propose a Native Connector for MySQL......
Custom properties (WLanguage)
A custom property is a code element with two events......
Developing an iOS 13 widget
An iOS widget is an application intended to be displayed as a widget on iOS devices (iPhone, iPad, etc.
2. Performance profiler
WEBDEV Tutorial - Optimizing a WEBDEV project Lesson 2 - Performance profiler - 15 min
TableSearch (Function)
Performs a search in: a Table control, a TreeView Table control, a table displayed in a Combo Box control....
EmailNbMessage (Function)
Returns the number of incoming messages currently found: on the email server (POP3 protocol only). in the Outlook messaging software....
ReplicOpen (Function)
Opens a replication in direct mode or with a replication server.
iPrintSignature (Function)
Prints an image of the signature in a rectangular area.
Generation of a class diagram using reverse engineering
WINDEV, WINDEV Mobile and WEBDEV allow you to create the class diagram of an application using reverse engineering (files "......
Directory (Property)
The Directory property is used to manage the physical directory of HFSQL files.