Themes class

The IDE’s active-theme state — reached through Host.Themes. Pair with the Host.OnChangedTheme event to refresh any colour-sensitive elements the addin draws inside its tool windows.

Private Sub Host_OnProjectLoaded()
    ApplyThemeColors                      ' set initial colours based on the current theme
End Sub

Private Sub Host_OnChangedTheme(ByVal ThemeName As String)
    ApplyThemeColors                      ' user picked a new theme — re-apply
End Sub

Private Sub ApplyThemeColors()
    Select Case Host.Themes.ActiveThemeNameGroup
        Case "dark":  myToolWindow.ApplyCss "body { background: #1e1e1e; color: white; }"
        Case "light": myToolWindow.ApplyCss "body { background: white;   color: black; }"
    End Select
End Sub

• Properties

Properties

ActiveThemeName

The name of the current IDE theme — e.g. "Classic", "Dark", "Light". String, read-only.

Note that the set of available themes is determined by the IDE and may grow in future versions; do not switch on this value with an exhaustive Select Case. For binary light-vs-dark colour decisions, use ActiveThemeNameGroup instead.

ActiveThemeNameGroup

The high-level “family” the current theme belongs to. String, read-only — exactly "dark" or "light".

Useful for an addin that just wants to flip its own colours between dark-on-light and light-on-dark; far more robust than parsing ActiveThemeName.