Entry
R2 = window handle
R3 = icon handle
Exit
R0 = 0 if icon is not selected, 1 if it is selected
R3 = word at iconblock+20 (ie. pointer to indirected text for indirected text icon)
Detects whether the icon is selected, and returns 1 in R0 if it is, 0 otherwise. Also returns in R3 then value in the iconblock at offset 20. For an indirected text icon this will be a pointer to the text.
Provided by Icons
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