Вот так:
Add(ChildForm,15080718,371,182){
}
BEGIN_SDK
Add(EditMulti,1174080,21,21)
{
WorkCount=1
link(doWork1,16672530:doData,[(59,27)(59,139)])
}
Add(MainForm,4669972,175,105)
{
Left=35
Top=105
Visible=1
Caption="Дочерняя форма"
Point(doVisible)
}
Add(DoData,16672530,98,133)
{
Data=Integer(1)
link(onEventData,4669972:doVisible,[])
}
END_SDK
Add(Button,13960440,322,182)
{
Left=20
Top=15
Width=100
Caption="Показать"
link(onClick,15080718:doWork1,[])
}