MINIMIZEDMETRICS_ARRANGE is missing some flags

Namely the ones with added comments below.
That issue probably ought to be opened against the meta data though I'm not sure where that repository is now.

        public enum MINIMIZEDMETRICS_ARRANGE
        {
            ARW_BOTTOMLEFT = 0,
            ARW_BOTTOMRIGHT = 1,
            ARW_TOPLEFT = 2,
            ARW_TOPRIGHT = 3,
            /// <summary>
            /// Arrange left (valid with ARW_BOTTOMRIGHT and ARW_TOPRIGHT only).
            /// </summary>
            ARW_LEFT = 0x0000,
            /// <summary>
            /// Arrange right (valid with ARW_BOTTOMLEFT and ARW_TOPLEFT only).
            /// </summary>
            ARW_RIGHT = 0x0000,
            /// <summary>
            /// Arrange up (valid with ARW_BOTTOMLEFT and ARW_BOTTOMRIGHT only).
            /// </summary>
            ARW_UP = 0x0004,
            /// <summary>
            /// Arrange down (valid with ARW_TOPLEFT and ARW_TOPRIGHT only).
            /// </summary>
            ARW_DOWN = 0x0004,
            /// <summary>
            /// Hide minimized windows by moving them off the visible area of the screen.
            /// </summary>
            ARW_HIDE = 0x0008,
        }

The issue names MINIMIZEDMETRICS_ARRANGE and provides the missing enum members; begin by locating that enum in the win32metadata inputs or generated metadata and determine which repository owns its source. Compare the enum with the definitions shown in the issue, then verify that the generated metadata includes all listed flags.