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I’d like to paint my custom controls to match the style of the currently selected theme so how can I get access to the colours being used to paint backgrounds, borders etc.

In Elegant UI there is no such a thing like the system color set in Windows. Every themed control is painted using a skin object of class derived from Elegant.Ui.ControlSkin. Every skin object contains a collection of objects derived from the Elegant.Ui.ControlPaintInformation class which is used for storing paint information for every UI state that control supports (like hovered, pressed, disabled, etc). In the most cases the control background is painted with bitmaps. Anyway, tell us what kind of control do you want to paint so we can come up with a solution.

It would be enough for me to know the active colours being used for the backgrounds of Elegant.Ui.Panel and Elegant.UI.TextBox and the border and text colour of Elegant.UI.TextBox. Is it possible to get these from properties somewhere?

You can retrieve the background color of Elegant.Ui.Panel using the following code

PanelSkin panelSkin = (PanelSkin)SkinManager.GetSkin("Panel");
Color panelBackColor = panelSkin.GetPaintInformation(ControlState.Normal).BackgroundGlyph.BackgroundColor;

The code below allows you to get the border color and the text color of Elegant.Ui.TextBox

TextBoxSkin textBoxSkin = (TextBoxSkin)SkinManager.GetSkin("TextBox.TextBox");
TextBoxPaintInformation textBoxPaintInformation = (TextBoxPaintInformation)
textBoxSkin.GetPaintInformation(TextBoxState.Normal); // This way you can get paint information for any textbox state
Color borderColor = textBoxPaintInformation.BorderGlyph.BackgroundColor;
Color textColor = textBoxPaintInformation.ForegroundColor;

That’s perfect, thank you!