openmw-tes3coop/extern/mygui_3.0.1/openmw_resources/openmw_messagebox_layout.xml

<?xml version="1.0" encoding="UTF-8"?>

<MyGUI type="Layout">
    <Widget type="Window" skin="MW_Dialog" layer="Windows" position="0 0 491 302" name="_Main">
        <Widget type="StaticText" skin="HeaderText" position="0 0 162 18" name="message" align="ALIGN_LEFT ALIGN_TOP">
            <Property key="Widget_Caption" value="Test:"/>
            <Property key="Widget_AlignText" value="ALIGN_LEFT ALIGN_TOP"/>
        </Widget>
    </Widget>
</MyGUI>