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06-23-20, 10:53 PM   #9
SDPhantom
A Pyroguard Emberseer
 
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Join Date: Jul 2006
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You send the string "{rt8}" and the client on the receiving end converts it into the appropriate texture. In Classic, this is done by ChatFrame_ReplaceIconAndGroupExpressions(). In Modern, this was moved into C code and is handled by C_ChatInfo.ReplaceIconAndGroupExpressions().

Here's a list of these icon tags.
https://wow.gamepedia.com/Chat_substitutions
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