# How can I output custom message in the output window from paraview source code.

**URL:** https://discourse.paraview.org/t/how-can-i-output-custom-message-in-the-output-window-from-paraview-source-code/5090
**Category:** ParaView Support
**Created:** [August 12, 2020, 6:13am UTC](https://discourse.paraview.org/t/how-can-i-output-custom-message-in-the-output-window-from-paraview-source-code/5090 "2020-08-12T06:13:54Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![lyz](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/l/e47774/32.png) [@lyz](https://discourse.paraview.org/u/lyz)
#### Post date: [August 12, 2020, 6:13am UTC](https://discourse.paraview.org/t/how-can-i-output-custom-message-in-the-output-window-from-paraview-source-code/5090/1 "2020-08-12T06:13:54Z")

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How can I output custom message in the output window from paraview source code. (version 5.7.0)  
I have tried ‘vtkGenericWarningMarco’ and '‘vtkOutputWindowDisplayText’, but there is no message in the output window.

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [August 27, 2020, 1:28pm UTC](https://discourse.paraview.org/t/how-can-i-output-custom-message-in-the-output-window-from-paraview-source-code/5090/2 "2020-08-27T13:28:24Z")

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vtkWarningMacro and vtkErrorMacro should output to the output window.