Altering the Keyboard functionality WPF

    <Window.Resources>

         <!--UI commands.-->

        <RoutedUICommand x:Key="Commands.ZoomOut" />

        <RoutedUICommand x:Key="Commands.ZoomIn" />

    </Window.Resources>

    <Window.InputBindings>       

        <!--Bind keys to commands.-->       

        <KeyBinding

                                                Key="Minus"

                                                Command="{StaticResource Commands.ZoomOut}"

                                                />

        <KeyBinding

                                                Key="Plus"

                                                Command="{StaticResource Commands.ZoomIn}"

                                                />

        <KeyBinding

                                                Key="Space"

                                                Command="{StaticResource Commands.ZoomIn}"

                                                />

     

    </Window.InputBindings>

    <Window.CommandBindings>

       

        <!--Bind commands to event handlers.-->

       

        <CommandBinding

            Command="{StaticResource Commands.ZoomOut}"

            Executed="ZoomOut_Executed"

            />

        <CommandBinding

            Command="{StaticResource Commands.ZoomIn}"

            Executed="ZoomIn_Executed"

            />

    </Window.CommandBindings>