[messages] [Module Design] How To make the map snap to a Ctrl-Mouse-Click

PaulC paul_chicoine at yahoo.com
Tue Jun 14 12:59:59 CEST 2016

I have a new module that I want to snap to an area of the map using the
Ctrl-Left-Mouse-Button and then display a red circle in the hex I
snapped to until the button is released; in the same way the VASL module
does.   The problem is that I can't figure out how it does it... so it
has to be a trick.

Does anyone know how to do this, or how it was done in the VASL module?

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