I have buttons supplied to me from photoshop for different button states.
It looks like this
<Button x:Name="ResultsBtn" Click="ResultsBtn_Click" FontSize="27" BorderThickness="0" Padding="-10" Margin="-10">
<Grid>
<Image Source="..But_01_Idle.png" Width="496"/>
<TextBlock Text="Results" Margin="174,21,172,23" Width="90" Height="40" Foreground="White" />
</Grid>
</Button>
The button looks right for just one state.
I want to use expression blend to record a state and change the background behind an image (in this instance an outer glow) or change the source on a state change.
I've noticed that blend only seems to record position and transforms and not changes in attributes.
Should I be doing this in code or rather have the photoshop file sent in a particular format so that it can be automatically converted by blend
You have to create a ControlTemplate:
Code for Button:
<Button Template={DynamicResource ButtonTemplate}/>
In your Resource Dictionary:
<ControlTemplate x:Key="ButtonTemplate" {x:Type Button}>
<Grid Padding="-10" Margin="-10">
<Image x:Name="IdleState" Source="..But_01_Idle.png" Width="496"/>
<Image x:Name="MouseOverState" Source="..But_01_MouseOver.png" Width="496"/>
<Image x:Name="PressedState..." etc/>
<TextBlock Text="Results" Margin="174,21,172,23" Width="90" Height="40" Foreground="White" FontSize="27"/>
</Grid>
</ControlTemplate>
Then, in Blend, Edit the Template and you'll find the States as Mike said. Use the Properties panel to hide / show your images for each state you want to style and you should be done.