Ok, actually, I see the same result as you when binding to
EVT_LEFT_DCLICK. However, I found in the doc another event:
stc.EVT_SCT_DOUBLECLICK, and when I bind to that,
GetSelectionStart() and GetSelectionEnd() return the correct
values.
<<<<<
Yes -- got it. Thanks! As for the completeness of the YellowBrain docs . . . well, yes, and no. I miss some of the excellent overviews the wxDocs package offers.