<summary> Flow direction of the text associated with the underline. This value is used to interpret whether the thickness value advances top to bottom, left to right, or right to left. </summary>
<summary> Locale of the text the underline is being drawn under. Can be pertinent where the locale affects how the underline is drawn. For example, in vertical text, the underline belongs on the left for Chinese but on the right for Japanese. This choice is completely left up to higher levels. </summary>
<summary> The measuring mode can be useful to the renderer to determine how underlines are rendered, e.g. rounding the thickness to a whole pixel in GDI-compatible modes. </summary>
<summary> Offset of the underline from the baseline. A positive offset represents a position below the baseline and a negative offset is above. </summary>
<summary> Reading direction of the text associated with the underline. This value is used to interpret whether the width value runs horizontally or vertically. </summary>
<summary> Height of the tallest run where the underline applies. </summary>
<summary> Thickness of the underline, measured perpendicular to the baseline. </summary>
<summary> Width of the underline, measured parallel to the baseline. </summary>
<summary> The DWRITE_UNDERLINE structure contains information about the size and placement of underlines. All coordinates are in device independent pixels (DIPs). </summary>