Entry
R0 = non-zero for ellipsis (only if enabled in WimpExt_Initialise)
R2 = window handle
R3 = icon handle
R4 -> string
Copies the string pointed to by R2 into the specified indirected text icon, and updates the screen if necessary. If the caret was in the icon then it is moved to the end of the new string. Only updates the screen if anything was changed - ie. if the new string is the same as the old string then nothing will happen.
If R0 is non-zero and bit 7 was set in R2 in WimpExt_Initialise and the string is longer than the icon can hold then the string will be post-fixed with ....
Provided by Icons
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