4.2.2 FlushComposeOnce Drawing Order
The following is an annotated dump of the TS_COMPDESK_FLUSH_COMPOSEONCE message.
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00000000 32 07 0c 00 b5 00 00 00 d8 08 0f 17 00 00 00 00 2............... 32 -> TS_ORDER_HEADER::controlFlags (TS_ALTSEC_COMPDESK_FIRST) 0 --\ 0 | 1 | Order Type = 0x0c = 12 = TS_ALTSEC_COMPDESK_FIRST 1 | 0 | 0 --/ 1 --\ 0x2 = TS_SECONDARY = Alternate Secondary Order 0 --/ 07 -> TS_COMPDESK_FLUSH_COMPOSEONCE::operation = FLUSHCOMPOSEONCE (7) 0c 00 -> TS_COMPDESK_FLUSH_COMPOSEONCE::size = 0x000c = 12 bytes b5 00 00 00 -> TS_COMPDESK_FLUSH_COMPOSEONCE::cacheId = 0x00000000b5 d8 08 0f 17 00 00 00 00 -> TS_COMPDESK_FLUSH_COMPOSEONCE::hLSurface = 0x00000000170f08d8