en-us/Creating_Colorized_Format_With_Custom_Actions.walkthru.help.txt
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# It's a piece of cake to do colorized formatting and output in PowerShell: once you know the right tricks.
# List Views and Table views are kind of obvious. To do something like colorized output, you need to use a CustomControl. # A Custom Control can do any action you'd like in response to that type being rendered. # This very short custom control will put an * on the screen in green if $_.Good is found on a type Write-FormatView -TypeName GoodOrBad -Action { if ($_.Good) { Write-Host "*" -ForegroundColor Green } else { Write-Host "*" -ForegroundColor Red } # Output null, so that nothing is rendered and no brackets appear (indicating output was expected) $null } # To highlight the whole line, you will need to use the host object, and pad each line to the right size Write-FormatView -TypeName GoodOrBad -Action { $background = 'White' $width = $host.UI.RawUI.BufferSize.Width if ($_.Good) { Write-Host "*".PadRight($width) -ForegroundColor Green } else { Write-Host "*".PadRight($width) -ForegroundColor Red } # Output null, so that nothing is rendered and no brackets appear (indicating output was expected) $null } # That's it. There's really not that much to colorized formatting in PowerShell, once you know the trick. # To use a view like this in your module, use some code like this: $views = @() $views += Write-FormatView -TypeName GoodOrBad -Action { $background = 'White' $width = $host.UI.RawUI.BufferSize.Width if ($_.Good) { Write-Host "*".PadRight($width) -ForegroundColor Green } else { Write-Host "*".PadRight($width) -ForegroundColor Red } # Output null, so that nothing is rendered and no brackets appear (indicating output was expected) $null } $views | Out-FormatData | Set-Content .\YourModule.Format.ps1xml |