The DialogOptionsRenderingInfo instance is used by the custom dialog options system. You can never create one yourself, it will be passed in to the dialog option functions as described in the linked page.

In this section:

ActiveOptionID property
DialogToRender property
Height property (DialogOptionsRenderingInfo)
ParserTextBoxWidth property
ParserTextBoxX property
ParserTextBoxY property
Surface property (DialogOptionsRenderingInfo)
Width property (DialogOptionsRenderingInfo)
X property (DialogOptionsRenderingInfo)
Y property (DialogOptionsRenderingInfo)