function showConvert($owner) {
    $form = New-Object System.Windows.Forms.Form
    $form.Owner = $owner
    $form.icon = $icon
    $form.Text = "Convertir"
    $form.Width = 445
    $form.Height = 260
    $form.AutoSize = $true
    $form.MaximizeBox = $false
    $form.StartPosition = [System.Windows.Forms.FormStartPosition]::CenterParent
    $form.Font = "Microsoft Sans Serif, 9.35"
    $form.FormBorderStyle = 'FixedDialog'


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

    $text_ori = New-Object System.Windows.Forms.TextBox
    $text_ori.Text = $sel_ori
    $text_ori.Width = 250
    $text_ori.Location = New-Object System.Drawing.Point(80, 20)
    $text_ori.add_DoubleClick({
            $text_ori.SelectAll();
        })

    $btn_ori = New-Object System.Windows.Forms.Button
    $btn_ori.Text = "Examinar"
    $btn_ori.AutoSize = $true
    $btn_ori.Location = New-Object System.Drawing.Point(335, 18)
    $btn_ori.Add_Click({
            $res = selectFile -path "" -formats "Videos (*.*)|*.*" -multi $true
            if ($res -ne $null) {
                $text_ori.Text = ($res -join "::")
                if ($res -is [array]) {
                    $dimensions = getDimensions -in $res[0]
                } 
                else {
                    $dimensions = getDimensions -in $res
                }
                if ($dimensions) {
                    $label_dim.Enabled = $true
                    $text_dim.Enabled = $true
                    $text_dim.Text = $dimensions
                }
            }
        })



    $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, 58)

    $text_dest = New-Object System.Windows.Forms.TextBox
    $text_dest.Text = $def_dest_dir
    $text_dest.Width = 250
    $text_dest.Location = New-Object System.Drawing.Point(80, 55)
    $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, 53)
    $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, 93)
    
    $text_name = New-Object System.Windows.Forms.TextBox
    $text_name.Text = "[filename] - Convertido"
    $text_name.Width = 328
    $text_name.Location = New-Object System.Drawing.Point(80, 91)
    $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()
            }
        })



    $label_dim = New-Object System.Windows.Forms.Label
    $label_dim.Text = "Tamaño:"
    $label_dim.AutoSize = $true
    $label_dim.Location = New-Object System.Drawing.Point(20, 128)
    $label_dim.Enabled = $false

    $text_dim = New-Object System.Windows.Forms.TextBox
    $text_dim.Width = 80
    $text_dim.Location = New-Object System.Drawing.Point(80, 125)
    $text_dim.TextAlign = [System.Windows.Forms.HorizontalAlignment]::Center
    $text_dim.Enabled = $false



    $btn_exec = New-Object System.Windows.Forms.Button
    $btn_exec.Text = "Convertir"
    $btn_exec.Location = New-Object System.Drawing.Point(140, 170)
    $btn_exec.Width = 150
    $btn_exec.Height = 30
    $btn_exec.Add_Click({
            try {
                $prevCode = startAlwaysOn
                foreach ($file in ($text_ori.Text -split "::")) {
                    $name = $text_name.Text.replace("[filename]", (Get-Item $file).Basename)
                    $out_path = "$($text_dest.Text)\$name"
                    if ($text_dim.Enabled) {
                        $sp = ($text_dim.Text -split "x")
                        resize -in $file -out $out_path -width $sp[0] -height $sp[1]
                    }
                    else {
                        convert -in $file -out $out_path
                    }
                }
            }
            finally {
                endAlwaysOn -code $prevCode
            }
        })

    $form.Controls.Add($label_ori)
    $form.Controls.Add($text_ori)
    $form.Controls.Add($btn_ori)
    $form.Controls.Add($label_dest)
    $form.Controls.Add($text_dest)
    $form.Controls.Add($btn_dest)
    $form.Controls.Add($label_name)
    $form.Controls.Add($text_name)
    $form.Controls.Add($label_width)
    $form.Controls.Add($text_width)
    $form.Controls.Add($label_dim)
    $form.Controls.Add($text_dim)
    $form.Controls.Add($btn_exec)

    $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.ShowDialog()

    return $form
}