ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2025

NULL values in HFSQL
WINDEV, WEBDEV and WINDEV Mobile allow you to manage the NULL value in the items of the HFSQL data files and for all the other types of accesses (Native, OLE DB, ...
Max (Function)
Returns the greatest value passed as parameter.
<ANSI string>.ToNum (Function)
Returns the numeric value of a character string. This feature enables you to perform numeric calculations on strings.
<Source>.BuildKeyValue (Function)
Builds the value of a composite key to implement a filter (HFilter) or to perform a search (HReadSeekFirst, HReadSeekLast, etc.).
HBuildKeyValueANSI (Function)
Whatever the platform used, the data stored in HFSQL data files is in ANSI format.
StringToNum (Function)
Returns the numeric value of a character string. This feature enables you to perform numeric calculations on strings.
HBuildKeyValue (Function)
Builds the value of a composite key to implement a filter (HFilter) or to perform a search (HReadSeekFirst, HReadSeekLast, etc.).
ChronoValue (Function)
Indicates the time elapsed (in milliseconds) since the call to ChronoStart.
LocalStorageGet (Function)
Retrieves a value from the local storage.
Val (Function)
Returns the numeric value of a character string.
Operations in a Select query
The query editor allows you to perform operations on the values of an item...
<Array>.Min (Function)
Returns the lowest value in the array.
Min (Function)
Returns the lowest value.
Data persistence
The data persistence is used to store the value typed by the user...
<Array>.Max (Function)
Returns the greatest value in the array.
emailHeader (Type of variable)
The emailHeader type is used to retrieve or define the additional email headers.
How to manage a multi-selection in a List Box control?
This help page explains how to manage a multi-selection in a List Box control....
ArraySeekByProcedure (Function)
Seeks an element in a one-dimensional WLanguage array by using a comparison procedure.
hServerOperation (Type of variable)
The hServerOperation type is used to get the characteristics of an operation performed on an HFSQL...
StatStandardDeviationP (Example)
Usage example of the StatStandardDeviationP function
WLanguage procedure called by fListFile
WLanguage procedure ("Callback") called by fListFile for each file found.
AuthToken (Type of variable)
The AuthToken type contains the characteristics of a token to access a web service.
The "Funnel" charts
...The Funnel charts are often used to represent the steps in a sales process and to indicate...
Handling ListView controls programmatically
WINDEV allows you to programmatically handle ListView controls......
Native xBase/FoxPro Access: Specific features and remarks
This help page presents the specific features regarding the programming of Native xBase/FoxPro...
Optional connection information
When defining the connections in the data model editor or when defining the connections...
Mathematical SQL functions
The mathematical SQL functions that can be used on the queries written in SQL code...
MemSeek (Example)
Usage example of the MemSeek function
Token (Type of variable)
The Token type is used to define all the advanced characteristics of a token displayed in an edit...
Creating and testing a query with parameters
Regardless of the query type (Select, Insert, Delete, Update) and regardless of its creation mode...
rssChannel (Type of variable)
The rssChannel type is used to handle a RSS channel...
WithInput (Property)
The WithInput property determines if a Combo Box control supports data input, and enables...
PageWriteHeaderHTTP (Function)
Adds an additional HTTP header that will be returned to the browser: during the next function...
FinRedemption (Function)
Creates an amortization matrix for a fixed-rate loan over a defined period of time.
iFrame control properties
The iFrame control can be handled in server code and in browser code by the WLanguage properties......
Web Component control properties
The Web Component control can be handled by the WLanguage properties in server code and in browser...
Error 532: The size of the string to extract must be strictly positive
Example for creating a select query
This help page explains how to create two select queries......
Customizing the Switch controls
The Switch control is a 2-state Check Box control (on/off, true/false, yes/no)......
SQLAssociate (Function)
Automatically associates each column of the query result with a control or with a variable...