Hi Erik,

>Check out the help for UDFPARMS...

Try this:

Var = 'Passed by Value'
do passcheck with Var
wait window Var

proc passcheck
    lparam tVar
    tVar = 'Passed by Reference'
endproc

Now Try

Var = 'Passed by Value'
do passcheck with (Var)
wait window Var

proc passcheck
    lparam tVar
    tVar = 'Passed by Reference'
endproc

Notice the only differnce is the DO line. Am I missing the point again?