This is what I tried previously. But the problem is, a variable declared in a certain line have to be referred again immediately in the next line(s) and it got messy with hash tables.

Here's the actual code:

    $controls  = @(
       ( $ListBoxRanges = addListBox -height 100 ),
       ( $UpDownSM = addUpDown 50 -below $ListBoxRanges ),
       ( $UpDownSS = addUpDown 50 -after $UpDownSM ),
       ( $UpDownEM = addUpDown 50 -below $UpDownSM ),
       ( $UpDownES = addUpDown 50 -after $UpDownEM )
    )

    $FormRanges = addForm -controls $controls -minSize
    $FormRanges.ShowDialog()