Yes - here's the relevant doc.
Quote: "Previously only types could be passed into functions and they were passed by value, meaning the type would be copied into a new variable which was then deleted at the end of the function. Now types can be passed by reference meaning that the variable being passed in will be modified by any changes in the function"
function func1( a as point ) // pass by value, variable is copied
a.x = 5 // this change is local and lost at the end of the function
endfunction
function func2( a ref as point ) // pass by reference, variable is the original
a.x = 7 // this change modifies the original variable
endfunction
type point
x as float
y as float
endtype
myVar as point
myVar.x = 1
myVar.y = 2
func1( myVar ) // doesn't change the variable
print( myVar.x ) // will print "1"
func2( myVar ) // does change the variable
print( myVar.x ) // will print "7"
