=> R1 = pointer to block which contains window handle.
<= Block in R1 contains :
0 Window Handle (or -2 for icon bar)
4 Visible area minimum x
8 Visible area minimum y
12 Visible area maximum x
16 Visible area maximum y
20 Scroll x offset
24 Scroll y offset
28 Handle to open window behind
32 Window flags
This call reads a window's visible state. The nested version can be used to read the window's parent.
See PRM 3, page 135.
Wimp_GetWindowState (nested version)
=> R1 = pointer to block containing window handle
R2 = "TASK" (&4B534154)
<= R3 = parent window handle, or -1 if top level
R4 = nesting flags
This version of the call returns not only the updated block but information about the window within which it is embedded.
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