function showMix($owner) {
    $form = New-Object System.Windows.Forms.Form
    $form.Owner = $owner
    $form.icon = $icon
    $form.Text = "Mezclar"
    $form.Width = 445
    $form.Height = 345
    $form.AutoSize = $true
    $form.StartPosition = [System.Windows.Forms.FormStartPosition]::CenterParent 
    $form.Font = "Microsoft Sans Serif, 9.35"
    $form.FormBorderStyle = 'FixedDialog'


    $label_image = New-Object System.Windows.Forms.Label
    $label_image.Text = "Imagen:"
    $label_image.AutoSize = $true
    $label_image.Location = New-Object System.Drawing.Point(20, 23)

    $text_image = New-Object System.Windows.Forms.TextBox
    $text_image.Text = $sel_image
    $text_image.Width = 245
    $text_image.Location = New-Object System.Drawing.Point(85, 20)
    $text_image.add_DoubleClick({
            $text_image.SelectAll();
        })

    $btn_image = New-Object System.Windows.Forms.Button
    $btn_image.Text = "Examinar"
    $btn_image.AutoSize = $true
    $btn_image.Location = New-Object System.Drawing.Point(335, 18)
    $btn_image.Add_Click({    
            $res = selectFile -path "" -formats "Imagenes y Videos (*.*)|*.*"
            if ($null -ne $res) {
                $text_image.Text = $res
            }
        })



    $label_audio = New-Object System.Windows.Forms.Label
    $label_audio.Text = "Sonido:"
    $label_audio.AutoSize = $true
    $label_audio.Location = New-Object System.Drawing.Point(20, 58)

    $text_audio = New-Object System.Windows.Forms.TextBox
    $text_audio.Text = $sel_audio
    $text_audio.Width = 245
    $text_audio.Location = New-Object System.Drawing.Point(85, 55)
    $text_audio.add_DoubleClick({
            $text_audio.SelectAll();
        })

    $btn_audio = New-Object System.Windows.Forms.Button
    $btn_audio.Text = "Examinar"
    $btn_audio.AutoSize = $true
    $btn_audio.Location = New-Object System.Drawing.Point(335, 53)
    $btn_audio.Add_Click({    
            $res = selectFile -path "" -formats "Audios (*.*)|*.*"
            if ($null -ne $res) {
                $text_audio.Text = $res
            }
        })



    $label_subs = New-Object System.Windows.Forms.Label
    $label_subs.Text = "Subtítulos:"
    $label_subs.AutoSize = $true
    $label_subs.Location = New-Object System.Drawing.Point(20, 93)

    $text_subs = New-Object System.Windows.Forms.TextBox
    $text_subs.Text = $sel_audio
    $text_subs.Width = 245
    $text_subs.Location = New-Object System.Drawing.Point(85, 90)
    $text_subs.add_DoubleClick({
            $text_subs.SelectAll();
        })

    $btn_subs = New-Object System.Windows.Forms.Button
    $btn_subs.Text = "Examinar"
    $btn_subs.AutoSize = $true
    $btn_subs.Location = New-Object System.Drawing.Point(335, 88)
    $btn_subs.Add_Click({    
            $res = selectFile -path "" -formats "Subtitulos (*.*)|*.*"
            if ($null -ne $res) {
                $text_subs.Text = $res
                $radio_burn.Enabled = $true
                $radio_attach.Enabled = $true
            }
        })

    $radio_group = New-Object System.Windows.Forms.Panel
    $radio_group.Location = '85,119'
    $radio_group.Width = 325
    $radio_group.Height = 25
    # $radio_group.text = "Imagen"
    $form.Controls.Add($radio_group)
    
    $radio_burn = New-Object System.Windows.Forms.RadioButton
    $radio_burn.Location = '2,5'
    $radio_burn.AutoSize = $true
    $radio_burn.Checked = $true
    $radio_burn.Enabled = $false
    $radio_burn.Text = "Incrustados"

    $radio_attach = New-Object System.Windows.Forms.RadioButton
    $radio_attach.Location = '100,5'
    $radio_attach.AutoSize = $true
    $radio_attach.Checked = $false
    $radio_attach.Enabled = $false
    $radio_attach.Text = "Adjuntos"

    $radio_group.Controls.AddRange(@($radio_burn, $radio_attach))


    $label_dest = New-Object System.Windows.Forms.Label
    $label_dest.Text = "Destino:"
    $label_dest.AutoSize = $true
    $label_dest.Location = New-Object System.Drawing.Point(20, 160)

    $text_dest = New-Object System.Windows.Forms.TextBox
    $text_dest.Text = $def_dest_dir
    $text_dest.Width = 245
    $text_dest.Location = New-Object System.Drawing.Point(85, 157)
    $text_dest.add_DoubleClick({
            $text_dest.SelectAll();
        })

    $btn_dest = New-Object System.Windows.Forms.Button
    $btn_dest.Text = "Examinar"
    $btn_dest.AutoSize = $true
    $btn_dest.Location = New-Object System.Drawing.Point(335, 155)
    $btn_dest.Add_Click({    
            $dest = selectFolder -path $def_dest_dir
            if ($dest) {
                $text_dest.Text = $dest
            }
        })



    $label_name = New-Object System.Windows.Forms.Label
    $label_name.Text = "Nombre:"
    $label_name.AutoSize = $true
    $label_name.Location = New-Object System.Drawing.Point(20, 195)
    
    $text_name = New-Object System.Windows.Forms.TextBox
    $text_name.Text = "Mezcla - $(Get-Date -Format "yyyy-MM-dd HH.mm")"
    $text_name.Width = 323
    $text_name.Location = New-Object System.Drawing.Point(85, 193)
    $text_name.add_TextChanged({
            removeInvalidChars -textbox $text_name
        })
    $text_name.add_DoubleClick({
            $text_name.SelectAll();
        })
    $text_name.Add_KeyDown({
            if ($_.KeyCode -eq "Enter") {
                $btn_exec.PerformClick()
            }
        })

    $check_encode = New-Object System.Windows.Forms.Checkbox 
    $check_encode.Location = New-Object System.Drawing.Point(85, 227)
    $check_encode.AutoSize = $true
    $check_encode.Text = "Recodificar"
    $check_encode.Checked = $true
    $check_encode.Enabled = $false
    $form.Controls.Add($check_encode)

    $btn_exec = New-Object System.Windows.Forms.Button
    $btn_exec.Text = "Mezclar"
    $btn_exec.Location = New-Object System.Drawing.Point(140, 260)
    $btn_exec.Width = 150
    $btn_exec.Height = 30
    $btn_exec.Add_Click({   
            try {
                $prevCode = startAlwaysOn
                $subs_mode = ""
                if ($radio_burn.Checked) {
                    $subs_mode = "burn"
                }
                elseif ($radio_attach.Checked) {
                    $subs_mode = "attach"
                }
                mix -image $text_image.Text -audio $text_audio.Text -subs $text_subs.Text -subs_mode $subs_mode -out "$($text_dest.Text)\$($text_name.Text)" -encode $check_encode.Checked
            }
            finally {
                endAlwaysOn -code $prevCode
            } 
        })

    $form.Controls.Add($label_image)
    $form.Controls.Add($text_image)
    $form.Controls.Add($btn_image)
    $form.Controls.Add($label_audio)
    $form.Controls.Add($text_audio)
    $form.Controls.Add($btn_audio)
    $form.Controls.Add($label_subs)
    $form.Controls.Add($text_subs)
    $form.Controls.Add($btn_subs)
    $form.Controls.Add($label_dest)
    $form.Controls.Add($text_dest)
    $form.Controls.Add($btn_dest)
    $form.Controls.Add($label_name)
    $form.Controls.Add($text_name)
    $form.Controls.Add($btn_exec)
    $text_image.Select()

    $form.Add_Closing({
            $owner.Location = getRelativeLocation -parent $owner -child $form
            $form.Hide()
            $owner.Show()
        })
        
    [PSAppID]::SetAppIdForWindow($form.handle, "$($metadata.package).$app_name")

    $form.Add_LocationChanged({ $global:win_loc = $form.Location })
    $form.Add_Resize({          $global:win_size = $form.Size })

    $form.MaximizeBox = $false
    $form.ShowDialog()
}