Right click and drag event handler

Hello everyone
Xojo

I am grateful for the interest and scope of the following:

What is the event handler that determines if the right mouse click is pressed and dragged to the left or to the right in a textfield of a desktop system?

Cordially

Raul Juarez Pulache

MouseDown, MouseDrag
OnContextualClick

Language Ref describes all of the above

Thank you so much
Dave S
with Me.selLength I resolved what I needed, I wanted to know if the text was selected
I did not correctly ask the question
A hug

Raul