INT 2fH 170aH: Obtain Device Capabilities

                                                    Compatibility:  WIN 3.0+ 
 Expects: AX    170aH
          DX    GDI information index (see below)
 Returns: AX    integer value of desired item
                0000h = error
    Info: This can be used to obtain information about the capabilities of
          the Windows display device driver. Equivalent to GetDeviceCaps.

          This calls the windows fn GetDeviceCaps, passing an hDC (handle
          to a Device Context) of the display device.

       DX is one of the index numbers that may be used in the Windows
          GetDeviceCaps call.  For instance, DX=0004H obtains the
          horizontal size of the display, in pixels and DX=0006H obtains
          the vertical size.

          These index values (and the often bit-encoded) return values can
          be found by browsing the Windows.H - part of the SDK.

    Note: It's not clear to me why this fn is included with the Clipboard

See Also: INT 2fH 17xxH: Windows Clipboard Functions
          INT 2fH: Multiplex Interrupt
          DOS Functions