How to make a Custom Chatbar?

Commonly for user created chat bars, the user would force focus on the textbox. To accomplish this, we can use the CaptureFocus() function. Once we have ran the function we can set up another connection line for FocusLost, which returns if Enter has been pressed.

local ChatBar = script.Parent
game:GetService("UserInputService").InputBegan:connect(function(input,proc)
    if not proc and input.KeyCode == Enum.KeyCode.Slash then
        if ChatBar.Transparency == .5 then
            ChatBar.Transparency = .25
            ChatBar:CaptureFocus()
        end
    end
end)
ChatBar.FocusLost:connect(function(enterPressed)
    if enterPressed then
        --Code to give ChatBar Text to server.
    end
end)

Once you start using a custom chat bar, you will have to make your own chat commands and alternate means of making Chatted Command scripts work (emotes, whispering, and team chatting will need to be set up by yourself).

If you have any questions, feel free to ask in the comments. If this answered your question then hit the accept answer button.