BPASmartClient/BPASmartClient.SCADAControl/CustomerControls/TheCheckBox.xaml

<CheckBox x:Class="BPASmartClient.SCADAControl.CustomerControls.TheCheckBox"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:BPASmartClient.SCADAControl.CustomerControls"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <CheckBox.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/BPASmartClient.SCADAControl;component/Themes/Generic.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </CheckBox.Resources>
</CheckBox>