openDrop
Syntax
on openDrop
...
end openDrop
Explanation
This message is sent the first time the user picks up something in another window (or possibly even another application) and dragged it over a window in SuperCard. You can e.g. examinee the dragged data and cache information about it.
You can then use that information in mouseDrop
/mouseDropEnter
/mouseDropLeave
and clean it up when you get the corresponding closeDrop
message.