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  • Use conditions according to the platforms
  • Closing the trace window
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Stored procedures
Warning
From version 17 (78), StartTrace is kept for backward compatibility. This function is replaced by TraceStart.
Opens the trace window or saves the trace information in a text file.
Remarks:
  • TraceStart has no effect if the trace window is already opened.
  • TraceStart is optional. The first call to Trace automatically opens the trace window.TraceStart is optional. The first call to Trace or to TraceBuild automatically opens the trace window.
Versions 17 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
Android This function is now available for Android applications.
New in version 17
iPhone/iPad This function is now available for iPhone/iPad applications.
Android This function is now available for Android applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
Android This function is now available for Android applications.
Versions 18 and later
Android Widget This function is now available in Android Widget mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Android Widget This function is now available in Android Widget mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Android Widget This function is now available in Android Widget mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Versions 21 and later
Apple Watch This function is now available in Apple Watch mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Apple Watch This function is now available in Apple Watch mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Apple Watch This function is now available in Apple Watch mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Example
iPhone/iPadApple WatchWindows MobileUniversal Windows 10 App
// Opens the trace window
TraceStart()
...
// Writes into the trace window
Trace("Calculation result: " + ResCalc)
iPhone/iPadApple WatchWindows MobileUniversal Windows 10 App
// Disable the calls to the Trace function
TraceStart(trDisable)
...
Trace("Calculation result: " + ResCalc)  // Trace has no effect
Syntax
TraceStart([<Characteristic> [, <Trace file>]])
<Characteristic>: Optional constant
Characteristics of trace:
trCreationClears the trace file.
trTopMostThe trace window will be displayed above all the system windows.
AndroidAndroid Widget iPhone/iPadApple Watch This constant is not available.
trDisableAll the calls to Trace will be ignored.
trWindow
(Default value)
The trace window is displayed in the top left corner of the screen.

AndroidAndroid Widget iPhone/iPadApple WatchWindows Mobile The trace window will not be displayed when starting the application.
  • iPhone/iPadApple Watch the requested information will be displayed in the window for standard output of Xcode.
  • AndroidAndroid Widget the requested information will be stored in the application log (at run time or in emulation mode). This log can be viewed when the device is connected via USB or when using the emulator from the DDMS application supplied with the Android SDK.

trFileThe trace window will not be displayed anymore and the information found in the trace window will be saved in the file named <Trace File>.

trWindow + trFileThe trace window will be displayed and the content of the trace window will also be saved in the file named <Trace File>.
<Trace file>: Optional character string (with quotes)
Name and full path of the file where the information found in the trace window will be saved. If this parameter is not specified, the trace file will be created at the root of the "C" drive and its name will have the following format "Trace_<ProjectName>.txt".
Windows Mobile If this parameter is not specified, the trace file will be created at the root of the disk and its name will follow the format "Trace_<ProjectName>.txt".
AndroidAndroid Widget If this parameter is not specified, the file is created in the current directory of the application (known via fCurrentDir) under the name, "Trace_<ProjectName>.txt".
Universal Windows 10 App If this parameter is not specified, the file is created in the data directory of the application (returned by fDataDir) and it is named "Trace_<ProjectName>.txt".
iPhone/iPadApple Watch If this parameter is not specified, the file is created in the "documents" directory of the application and it is named "Trace_<ProjectName>.txt".
Remarks

Use conditions according to the platforms

AndroidAndroid Widget TraceStart is used to save the requested information:
  • in the application log (at runtime or in emulator mode). This log can be viewed when the device is connected via USB or when using the emulator from the DDMS application supplied with the Android SDK.
  • in a specific text file.
iPhone/iPadApple Watch TraceStart is used to:
  • display the requested information in the window for standard output of Xcode.
  • save the requested information in a specific text file.

Closing the trace window

TraceEnd is used to close the trace window.
If the trFile constant is specified, TraceEnd stops saving to the trace file.
Component : wd250vm.dll
Minimum version required
  • Version 9
This page is also available for…
Comments
Video Trace
https://youtu.be/scI5wQu-jXk
//
fDelete("C:\TEMP\ARQUIVO.TXT") // ELIMINA ARQUIVOS CASO JA EXISTA
TraceStart(trFile+trWindow,"C:\TEMP\ARQUIVO.TXT")
FOR EACH cliente // ESTOU PERCORRENDO A TABELA CLIENTE // I AM PERCURRING THE CLIENT TABLE // Je passe à la table des clients
Trace(cliente.id_cliente+"|"+cliente.razao_social_nome+"|")
END
TraceEnd() // FINALIZANDO O TRACE // FINISHING THE TRACE // FINITION DE LA TRACE
ShellExecute("C:\TEMP\ARQUIVO.TXT")
amarildo
30 Dec. 2018