01_ScreenShotOCR/CaptureWindow.xaml

<Window x:Class="ScreenShotOCR.CaptureWindow"
        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"
        xmlns:local="clr-namespace:ScreenShotOCR"
        mc:Ignorable="d"
        Title="CaptureWindow" Height="800" Width="600" WindowStyle="None" ResizeMode="NoResize" WindowState="Maximized" AllowsTransparency="True">
    <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <Rectangle Height="30" Fill="#FF5291FF" Margin="0,0,0,770" VerticalAlignment="Top" />
        <TextBlock Text="ScreenShot OCR - CaptureWindow" FontWeight="Bold" Margin="10,10,365,770" Height="20" VerticalAlignment="Top"/>
        <TextBlock Text="by PINB" HorizontalAlignment="Right" FontSize="10" FontStyle="Italic" Margin="0,12,0,768" Width="50" Height="20" VerticalAlignment="Top"/>
        <Button x:Name="copyBtn" Width="120" Height="20" Content="Copy to clipboard" Margin="340,35,140,0" VerticalAlignment="Top" Background="#FFFFE752" BorderBrush="#FFFFE752" Click="copyBtn_Click">
            <Button.Resources>
                <Style TargetType="{x:Type Border}">
                    <Setter Property="CornerRadius" Value="10"/>
                    <Setter Property="Effect">
                        <Setter.Value>
                            <DropShadowEffect Color="Black" Direction="320" ShadowDepth="3" BlurRadius="5" Opacity="0.5" />
                        </Setter.Value>
                    </Setter>
                </Style>
                <Style TargetType="{x:Type Button}">
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <!--<Setter Property="Background" Value="White"/>
                            <Setter Property="BorderBrush" Value="White"/>-->
                            <Setter Property="Foreground" Value="Orange"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Button.Resources>
        </Button>
        <Button x:Name="ClearBtn" Width="60" Height="20" Content="Clear" Margin="465,35,75,0" VerticalAlignment="Top" Background="#FFA852FF" BorderBrush="#FFA852FF" Click="ClearBtn_Click">
            <Button.Resources>
                <Style TargetType="{x:Type Border}">
                    <Setter Property="CornerRadius" Value="10"/>
                    <Setter Property="Effect">
                        <Setter.Value>
                            <DropShadowEffect Color="Black" Direction="320" ShadowDepth="3" BlurRadius="5" Opacity="0.5" />
                        </Setter.Value>
                    </Setter>
                </Style>
                <Style TargetType="{x:Type Button}">
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <!--<Setter Property="Background" Value="White"/>
                            <Setter Property="BorderBrush" Value="White"/>-->
                            <Setter Property="Foreground" Value="Purple"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Button.Resources>
        </Button>
        <Button x:Name="Close" Width="60" Height="20" Content="Close" Margin="530,35,10,0" VerticalAlignment="Top" Background="#FFFF5252" BorderBrush="#FFFF5252" Click="Close_Click">
            <Button.Resources>
                <Style TargetType="{x:Type Border}">
                    <Setter Property="CornerRadius" Value="10"/>
                    <Setter Property="Effect">
                        <Setter.Value>
                            <DropShadowEffect Color="Black" Direction="320" ShadowDepth="3" BlurRadius="5" Opacity="0.5" />
                        </Setter.Value>
                    </Setter>
                </Style>
                <Style TargetType="{x:Type Button}">
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <!--<Setter Property="Background" Value="White"/>
                            <Setter Property="BorderBrush" Value="White"/>-->
                            <Setter Property="Foreground" Value="Red"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Button.Resources>
        </Button>
        <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10,60,10,10">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="55*"/>
                <ColumnDefinition Width="3*"/>
            </Grid.ColumnDefinitions>
            <Image x:Name="ScreenView" Stretch="Fill" MouseDown="ScreenView_MouseDown" MouseMove="ScreenView_MouseMove" MouseUp="ScreenView_MouseUp" Grid.ColumnSpan="2"/>
        </Grid>
    </Grid>
</Window>