What is the identifier to make a message box appear. with a message and an OK Button

To my knowledge there isn't one. Sounds to me like you're talking about a dialog code.

/help dialogs

I stand ready to admit my lack of knowledge if someone else knows of such an identifier (excluding custom made identifiers, of course)

anyone able to make a quick one, its late and i wont b able to learn anything new tonight, just need something where it will come up with a mesage - u click OK and the script continues - nothing complicated

/help $input

alias testinput {
var %input = $input(Test $+ $crlf Input $+ $crlf Features,nv)
echo -a %input
}

k

var %check = $input(Do you want to continue,y)
if (%check!= $true) { return }