OBAppSrc/WpfApplicati.../ChooseRecord...

<Window x:Class="WpfApplication19.ChooseRecord"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="ChooseRecord" Height="136" Width="441" Name="ChooseRecordWindow">
    <Grid>
        <Label Content="Record Date Time" Height="28" HorizontalAlignment="Left" Margin="28,37,0,0" Name="label1" VerticalAlignment="Top" />
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="139,37,0,0" Name="DateTimeCB" VerticalAlignment="Top" Width="120" />
        <Button Content="OK" Height="23" HorizontalAlignment="Left" Margin="280,37,0,0" Name="PreviewBtn" VerticalAlignment="Top" Width="75" Click="PreviewBtn_Click" />
    </Grid>
</Window>