MainPage.xaml

<UserControl x:Class="wmvplayer.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">
    <Grid x:Name="LayoutRoot" Background="Black" Width="640" Height="480">
        <MediaElement Width="640" Height="480" Name="MediaElement" Source="mms://localhost:7144/stream/【stream id】.wmv?tip=【ip】" AutoPlay="True"></MediaElement>
    </Grid>
</UserControl>