Revit.Plugln/FWindSoft/FWindSoft.Wpf/ShowWindow/WinMessageTip.xaml

<Window x:Class="FWindSoft.Wpf.WinMessageTip"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             WindowStartupLocation="CenterOwner" Width="180" MinWidth="180" MaxWidth="400" Height="120" MinHeight="120" MaxHeight="300"
             ResizeMode="NoResize" SizeToContent="WidthAndHeight">
    <Grid >
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition Height="38"></RowDefinition>
        </Grid.RowDefinitions>
        <ScrollViewer VerticalScrollBarVisibility="Auto">
        <TextBlock x:Name="TxtMessage" Margin="20" VerticalAlignment="Center" HorizontalAlignment="Center" TextWrapping="Wrap"></TextBlock>
        </ScrollViewer> 
            <Border Grid.Row="1" BorderBrush="Black" BorderThickness="0,1,0,0" >
            <StackPanel x:Name="StackButtons" Margin="4" Orientation="Horizontal"  HorizontalAlignment="Right"></StackPanel>
        </Border>
       
    </Grid>
</Window>