ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2025

Null (Reserved word)
The Null keyword can be used according to different methods in WLanguage...
DateDifference (Function)
Calculates the number of days between two dates.
SysColorRes (Function)
Returns the resolution of the screen in number of colors.
Timer (Function)
Periodically and automatically calls a WLanguage procedure.
TimerSys (Function)
Periodically and automatically calls a WLanguage procedure.
DDEExecute (Function)
Sends a command that will be run on the server.
MatNbColumn (Function)
Returns the number of columns found in a matrix.
MatNbLine (Function)
Returns the number of rows found in a matrix.
tapiCallIsWaiting (Function)
Used to find out whether the call is on hold.
tapiCallEnd (Function)
Returns the date and time of the end of call.
tapiDial (Function)
Dials a phone number for a voice line.
tapiCalledID (Function)
Used to find out the phone number called.
SysSerialNum (Function)
Returns the IMEI number of the current device.
France.checkTaxNumber (Function)
Tests the validity of a French tax number.
PDFNbSignatures (Function)
Gets the number of signatures in a PDF document.
<pdfDocument variable>.NbSignatures (Function)
Gets the number of signatures in a PDF document.
<mongoDatabase variable>.DeteleDatabase (Function)
Deletes a MongoDB database as well as its collections.
Administrative number functions
The administrative identification number functions are as follows:
Italy.checkTaxNumber (Function)
Tests the validity of a tax number in Italy.
Switzerland.checkTaxNumber (Function)
Tests the validity of a tax number in Switzerland.
Brazil.checkTaxNumber (Function)
Tests the validity of a tax number in Brazil.
Belgium.checkTaxNumber (Function)
Tests the validity of a tax number in Belgium.
U.S.VerifyTaxNumber (Function)
Tests the validity of a US tax number.
Canada.checkTaxNumber (Function)
Tests the validity of a Canadian tax number.
Spain.checkTaxNumber (Function)
Tests the validity of a tax number in Spain.
Germany.checkTaxNumber (Function)
Tests the validity of a tax number in Germany.