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To retrieve all outputs from a PowerShell form's dynamic checkbox list, you can follow these steps:

1. Declare an empty array to store the selected items:

$selectedItems = @()

1. Bind a script block to the "CheckedChanged" event of the checkboxes:

$checkBoxes.Add_CheckedChanged({
    $checkBox = $this  # current checkbox
    $item = $checkBox.Text  # get the text of the checkbox
    if ($checkBox.Checked) {
        $selectedItems += $item  # add the item to the selected items array
    } else {
        $selectedItems -= $item  # remove the item from the selected items array if it was unchecked
    }
})

1. When you need to retrieve the selected items, simply access the $selectedItems array:

Write-Host "Selected items: $($selectedItems -join ', ')"