The Width and Height property represents the width
and the height of the control and Name
property represents name of the control.
The Slider control looks like this.

Figure1.gif
Vertical Slider control
Set the property Orientation= Vertical.
<Slider
Height="220"
Orientation="Vertical"
HorizontalAlignment="Left"
Margin="10,10,0,0"
Name="Slider1"
VerticalAlignment="Top"
Width="36" />
The Slider control looks like this.

Figure2.gif
Important property
Slider control has the following properties.
Minimum - The number that represents the
lowest (left or bottom) value.
Maximum - The number that represents the
highest (right or top) value.
LargeChange - The slip when a large
change in value is desired.
SmallChange - The slip when a small
change in value is desired.
Foreground - This property is used to
describes the foreground color.
Background -
This property is used to describes the background
color.
For example
Creating a Image control and a slider control in XAML.
XAML Code
<Window
x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow"
Height="350"
Width="525">
<Border
BorderBrush="Black"
BorderThickness="1"
Height="208"
Width="433"
Margin="20">
<Canvas
Height="200"
Width="200">
<Canvas.RenderTransform>
<TransformGroup>
<ScaleTransform
ScaleY="-1"
/>
</TransformGroup>
</Canvas.RenderTransform>
<Rectangle
Canvas.Top="-146"
Canvas.Left="-55"
Width="192"
Height="103"
Stroke="darkgreen"
StrokeThickness="3">
<Rectangle.Fill>
<ImageBrush
ImageSource="/WpfApplication65;component/Images/file4.jpg"
/>
</Rectangle.Fill>
<Rectangle.RenderTransform>
<ScaleTransform
ScaleX="{Binding
ElementName=slider,Path=Value}"
ScaleY="{Binding
ElementName=slider,Path=Value}"
/>
</Rectangle.RenderTransform>
</Rectangle>
<Slider
Name="slider"
Minimum="0"
Maximum="3"
TickPlacement="BottomRight"
TickFrequency="0.2"
IsSnapToTickEnabled="True"
Canvas.Left="-63"
Canvas.Top="-243"
Height="22" Width="222"
Value="1" />
</Canvas>
</Border>
</Window>