Switch UI to WPF

LoginScreen.xaml

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+<Window
+        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:local="clr-namespace:LAPS"
+        Title="LAPS" Height="200" Width="400" ResizeMode="NoResize">
+    <Grid FocusManager.FocusedElement="{Binding ElementName=UsernameTextbox}">
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="400*"/>
+        </Grid.ColumnDefinitions>
+        <Label Content="Identifiant" HorizontalAlignment="Left" Margin="55,27,0,0" VerticalAlignment="Top"/>
+        <Label x:Name="UserNameHelp" Content="admin-uid" HorizontalAlignment="Right" Margin="0,27,42,0" VerticalAlignment="Top" Width="220" Height="23" Foreground="#A5909090"/>
+        <TextBox x:Name="UsernameTextbox"  HorizontalAlignment="Right" Margin="0,30,40,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="220" Height="20" Background="Transparent"/>
+        <Label Content="Mot de passe" HorizontalAlignment="Left" Margin="38,64,0,0" VerticalAlignment="Top"/>
+        <PasswordBox x:Name="PasswordBox" HorizontalAlignment="Right" Margin="0,67,40,0" VerticalAlignment="Top" Width="220" Height="20"/>
+        <Button x:Name="ValidateButton" IsDefault="True" Content="OK" HorizontalAlignment="Right" Margin="42,108,40,0" VerticalAlignment="Top" Height="27" Width="72" Grid.Column="1"/>
+        <Label x:Name="errorLabel" Content="Error Label" HorizontalAlignment="Left" Margin="38,109,0,0" VerticalAlignment="Top" Width="220" Foreground="Red" Visibility="Hidden"/>
+    </Grid>
+</Window>

SearchScreen.xaml

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+<Window
+        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:local="clr-namespace:LAPS" xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
+        Title="LAPS" Height="300" Width="450" ResizeMode="NoResize">
+    <Grid FocusManager.FocusedElement="{Binding ElementName=computerNameTextbox}">
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="450*"/>
+        </Grid.ColumnDefinitions>
+        <Label Content="Nom de l'ordinateur" HorizontalAlignment="Left" Margin="42,37,0,0" VerticalAlignment="Top" RenderTransformOrigin="0.5,-0.024"/>
+        <TextBox x:Name="computerNameTextbox" HorizontalAlignment="Left" Margin="173,41,0,0" TextWrapping="NoWrap" Text="" VerticalAlignment="Top" Width="169"/>
+        <Image x:Name="searchBtn" HorizontalAlignment="Left" Height="15" Margin="352,41,0,0" VerticalAlignment="Top" Width="16"  RenderTransformOrigin="89.583,46.589"/>
+        <Label x:Name="expirationLabel" Content="Date d'expiration" HorizontalAlignment="Left" Margin="42,83,0,0" VerticalAlignment="Top" Visibility="Hidden" RenderTransformOrigin="0.5,-0.024"/>
+        <xctk:DateTimePicker x:Name="expirationTimeSelector" HorizontalAlignment="Left" Margin="173,85,0,0" Visibility="Hidden" VerticalAlignment="Top" Width="169" AllowSpin="False" ButtonSpinnerHeight="0" Format="Custom" Minimum="1970-01-01" FormatString="dd/MM/yyyy - HH:mm:ss" ShowButtonSpinner="False" TimePickerAllowSpin="False" TimePickerShowButtonSpinner="False" Text="" AutoCloseCalendarOnTimeSelection="True" TextAlignment="Left" TimeFormat="LongTime"/>
+		<Label x:Name="lapsAccountLabel" Content="Compte LAPS : " HorizontalAlignment="Left" Margin="170,115,0,0" VerticalAlignment="Top" Visibility="Hidden" RenderTransformOrigin="0.5,-0.024"/>
+        <Label x:Name="lapsPasswordLabel" Content="Mot de passe LAPS" HorizontalAlignment="Left" Margin="42,133,0,0" VerticalAlignment="Top" Visibility="Hidden" RenderTransformOrigin="0.5,-0.024"/>
+        <TextBox x:Name="LAPSTextbox" FontFamily="Consolas" FontSize="15" Text="P@ssw0rdO1234iJljL" TextWrapping="NoWrap" HorizontalAlignment="Left" Margin="173,137,0,0" Visibility="Hidden" VerticalAlignment="Top" Width="169" IsReadOnly="True" Background="#FFE4E4E4"/>
+        <Image x:Name="copyBtn" HorizontalAlignment="Left" Height="15" Margin="352,139,0,0" VerticalAlignment="Top" Width="16" Visibility="Hidden"/>
+        <TextBlock x:Name="errorText" Width="200" TextWrapping="Wrap" Text="Erreur : ????" HorizontalAlignment="Left" Margin="42,162,0,0" VerticalAlignment="Top" Visibility="Hidden" RenderTransformOrigin="0.5,-0.024"/>
+        <Button x:Name="updateBtn" Content="Mettre à jour" HorizontalAlignment="Left" Margin="258,181,0,0" VerticalAlignment="Top" Visibility="Hidden" Height="27" Width="84"/>
+
+    </Grid>
+</Window>