display caps

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DGuy

I understand this is just first draft code, but a couple of points to keep in mind (from MSDN, bolding mine):

When you call EnumDisplaySettings with iModeNum set to zero, the operating system initializes and caches information about the display device. When you call EnumDisplaySettings with iModeNum set to a non-zero value, the function returns the information that was cached the last time the function was called with iModeNum set to zero.

and

Before calling EnumDisplaySettings, set the dmSize member to sizeof(DEVMODE), and set the dmDriverExtra member to indicate the size, in bytes, of the additional space available to receive private driver data.