In a Canvas, I have DropObject; the code there calls a method who resize the dropped image.
For debug purposes (what a bad idea), I issue a MsgBox with the image width and height.
MsgBox "This is a Message Box "
That application have three other windows with Canvas, who accept images drop. Lately, I started to drop images (the same) onto all these four windows and noticed the MsgBox “freeze” my Finder.
a. The Finder "record the actions and execute them after a click in the OK button,
b. I put the code in the DropObject Event and get the same results.
Also, a Return keypress is lost (does not press the OK button), the MsgBox is frontmost.
El Capitan / Xojo 2015r1 (both running in the IDE and as stand alone application).