iLogic Theme Switcher

Inventor 2021 now comes with a dark theme. Along with the dark theme, the Inventor API samples were updated with a new code sample for switching themes.

I converted the initial VBA code sample to iLogic, and it works really well, the code builds a list of available themes (see my thoughts below about this), then presents the user with an “InputBox”, when a number (1 or 2) must be typed to choose a theme.

I took this idea and adapted it to use an Array for the list of themes, which is presented to the user in an “InputListBox”, this makes the selection much simpler (and faster) for the user. The animated GIF below shows the (shortened) process:

Click me for high res version

My thoughts on the listing of themes, makes me think that we will have more than just dark and light themes in upcoming releases, and maybe even the option of creating, or modifying our own themes, either way the iLogic utility below will be able to list them for you.

Here is the iLogic code

'This version of iLogic code by @ClintBrown3D, based on Inventor API sample - THIS CODE WILL ONLY WORK WITH INVENTOR 2021 or NEWER
'Originally Published at

Dim oThemeManager As ThemeManager
oThemeManager = ThisApplication.ThemeManager

Dim oTheme As Theme, i As Long: i = 0
    Dim sNames As String, sName As String
	Dim oThemes As New ArrayList
    For Each oTheme In oThemeManager.Themes
		i = i + 1
		oThemes.Add(i & " - " & oTheme.Name)
sName = InputListBox("Pick a Theme", oThemes, oThemes, Title := "@ClintBrown3D", ListName := "Themes") 
If sName = ("") Then : Return : End If
i = Left(sName, 1)
If oThemeManager.Themes.Item(i).Name <> oThemeManager.ActiveTheme.Name Then
	Call MsgBox("The selected theme is active, please select another theme.", vbOKOnly, "Unofficial Inventor")
End If


This version of the code was briefly tested in Inventor 2021.

As always, please test all iLogic code extensively on non-production files. Do not use any code in a production environment until YOU have thoroughly tested it and have verified that it works as expected. Always back up any data before running any experimental code. You are ultimately responsible for any iLogic code that you run, so make sure you test it thoroughly!