R0 = reason code
other registers as appropriate for reason code
R0 = 0 : Read defaults
----------------------
R1 = pointer to block to read values (64 bytes long)
Exit:
R1 + 0 = top-left colour
R1 + 4 = bottom-right colour
R1 + 8 = in colour
R1 + 12 = channel colour
R1 + 16 = minimum slabbing time
R1 + 20 = sprite style
bit meaning
0 0 = 3D, 1 = flat
1-31 reserved
Reads in the default values as specified by *WimpExt Defaults. The block
should be at least 64 bytes long, to allow room for future expansion.
R0 = 1 : Read window border thickness
-------------------------------------
Exit:
R2 = title thickness (OS Units)
R3 = vertical scrollbar thickness (OS Units)
R4 = horizontal scrollbar thickness (OS Units)
Reads the thickness of the window borders. Needed because on RISC OS 3 Acorn
rather stupidly decided to make it so that you can change their thickness.
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