<p>Determines how to sort the video modes returned by IDirectDraw::EnumDisplayModes</p>
<h3>Use system order</h3>
<p>Lists modes by the order generated by the system and/or DXGL.</p>
<h3>Group by color depth</h3>
<p>Lists modes in groups of color depth, each group sorted by resolution.</p>
<h3>Group by resolution</h3>
<p>Lists modes sorted by resolution, with color depths listed in order for each resolution.</p>