xamlspeech01

<Page
    x:Class="App1.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:App1"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">



    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <RelativePanel>
            <MediaElement x:Name="media" AutoPlay="False"/>
            <TextBox x:Name="textBox1" Text="My Dear Text" Margin="5"/>
            <Button x:Name="blueButton" Margin="5" Background="LightBlue" Content="ButtonRight" RelativePanel.RightOf="textBox1"/>
            <Button x:Name="orangeButton" Click="orangeButton_Click" Margin="5" Background="Orange" Content="ButtonBelow"
                    RelativePanel.RightOf="textBox1" RelativePanel.Below="blueButton"/>
            <Button x:Name="orangeButton2" Click="orangeButton2_Click" Margin="5" Background="Orange" Content="No. click this"
                    RelativePanel.RightOf="orangeButton" />
            <Button x:Name="orangeButton3" Click="orangeButton3_Click" Margin="5" Background="Orange" Content="No. In fact just click this"
                    RelativePanel.RightOf="orangeButton2" />
        </RelativePanel>
    </Grid>
</Page>

https://msdn.microsoft.com/en-us/library/windows.media.speechsynthesis.speechsynthesizer.aspx