Format of HLDPAL parameter block:
Offset	Size	Description	)
 00h	WORD	000Ah (length of following data)
 02h	BYTE	palette ID (00h = user, 01h = default)
 03h	BYTE	reserved
 04h	WORD	number of first palette entry
 06h	WORD	number of entries
 08h	DWORD	-> palette entries
SeeAlso: #03940