powerbuilder triggerevent example

Lets suppose that we have a window with two datawindow in it dw_1, dw_2 and two push buttons pb_1 pb_2.

pb_2 clicked event contains the following code
x1 = 1
dw_2.show()
dw_2.setfocus()


pb_1 clicked event contains the following code
x1 = 2
pb_2.triggerevent(clicked!)
messagebox("hi", string(x1))

my problem is that when i press pb1 button  pb2 clicked event is fired (x1 = 1) but dw_2 is receiving focus after the execution of messagebox command and not before it as i expected. Can i bypass this problem somehow (possibly with another technique)? i know than i can use a
responsed window containing dw_2 instead. i am interested in another solution if possible.