Using WPK for PowerShell GUI

We have created some great PowerShell scripts. But as time goes by we have given the scripts to non programmers. So we decided it was time for a simple easy to understand GUI for the PowerShell.

I have watched the channel 9 videos by James Brundage. His videos do a great job of explaining Window, Stack-Panel, Doc-Panel, Grid, Labels, and Textboxes. However there are over 60 controls in total. Not knowing WPF does not help.

What I would like to do is be able to do the following:

Text Input
Dropdown List
RadioButton Group
Checkbox Group

I came up with an example that does the first three but with bugs.
Радиоуправление визуально показывает первую выбранную кнопку, но когда я выбираю значение для группы, оно неверно.

Я не могу найти пример для флажка.

Любые подсказки приветствуются.

Вот это мой тест WPK в PowerShell:

function TestGui {
    Import-Module WPK

    $SelectedRadio = "First"

    New-Window -Title "Test User Input" -WindowStartupLocation CenterScreen `
      -Width 400 -Height 300 -Show {

      New-Grid -Rows 32*, 32*, 32*, 32* -Columns 100, 1* {

        #create style to use on controls
        $createLblStyle = @{
            Margin = 5
            HorizontalAlignment = "right"
            VerticalAlignment = "center"
        } 

        #Label Text for this row
        New-TextBlock -Text "Pick fruit" `
          -Row 0 -Column 0 @createLblStyle

        # dropdown ( combo box)
        New-ComboBox -Name FruitList `
          -row 0 -column 1 @createLblStyle `
          -Items { "Apple", "Pear", "Peach" } -SelectedIndex 0

        #Label Text for this row
        New-TextBlock -Text "Pick number" `
            -Row 1 -Column 0 @createLblStyle

        # TextBox
        New-TextBox -Name TextInputName `
          -Row 1 -Column 1 @createLblStyle 

        #Label Text for this row
        New-TextBlock -Text "Get Text Input" `
          -Row 2 -Column 0 @createLblStyle        

        #Do three radio buttons for this row.
        New-StackPanel -Row 2 -Column 1 -Orientation Horizontal {
            New-RadioButton -Content "Pick first" `
                -GroupName Results -IsChecked $True -On_Click {
                    $SelectedRadio = "First"
                }

            New-RadioButton -Content "Pick two" `
                -GroupName Results  -On_Click {
                    $SelectedRadio = "Second"
                }

            New-RadioButton -Content "Pick three" `
                -GroupName Results   -On_Click {
                    $SelectedRadio = "Third"
                }
        }


        New-Button -Content "_Call PS Script" -Row 3 -Column 0 -Margin 3 -On_Click {
          $FruitList          = $window | Get-ChildControl FruitList
          $TextInputName      = $Window | Get-ChildControl TextInputName
          $Results            = $Window | Get-ChildControl Results

          $Window.Close()
          write-host "call PS script with: "
          write-host "DropDown => " $FruitList.SelectedValue
          write-host "TextBox => " $TextInputName.Text
          write-host "Radio => " $SelectedRadio
    }

        New-Button -Content "Cancel" -Row 3 -Column 1 -Margin 3 -On_Click {
          $Window.Close()
          write-host "Cancel was pressed"
        }
      }
    }
}