Added the possibility to maximize a window (#7)

Author: lpeyr

PermaTop/UserControls/WindowPropertyItem.xaml

@@ -18,6 +18,7 @@
 				<ColumnDefinition Width="Auto"/>
 				<ColumnDefinition Width="Auto"/>
 				<ColumnDefinition Width="Auto"/>
+				<ColumnDefinition Width="Auto"/>
 			</Grid.ColumnDefinitions>
 			<TextBlock x:Name="TitleTxt" FontWeight="ExtraBold" d:Text="WindowTItle" FontSize="14" VerticalAlignment="Center">
 				<TextBlock.ToolTip>
@@ -26,7 +27,8 @@
 			</TextBlock>
             <Button Foreground="{DynamicResource Foreground1}" x:Name="FavBtn" Click="FavBtn_Click" Width="30" Grid.Column="2" Style="{DynamicResource DefaultButton}" Background="{DynamicResource Background2}" FontFamily="..\Fonts\#FluentSystemIcons-Regular" Content="&#xF710;" FontSize="14" Margin="0 0 5 0"/>
             <Button Foreground="{DynamicResource Foreground1}" x:Name="PinBtn" Click="PinBtn_Click" Width="30" Grid.Column="3" Style="{DynamicResource DefaultButton}" Background="{DynamicResource Background2}" FontFamily="..\Fonts\#FluentSystemIcons-Regular" Content="&#xF602;" FontSize="14" Margin="0 0 5 0"/>
-            <Button Foreground="{DynamicResource Foreground1}" x:Name="CloseBtn" Click="CloseBtn_Click" Width="30" Grid.Column="4" Style="{DynamicResource DefaultButton}" Background="{DynamicResource Background2}" FontFamily="..\Fonts\#FluentSystemIcons-Regular" Content="&#xF36A;" FontSize="14"/>
+            <Button Foreground="{DynamicResource Foreground1}" x:Name="MaxRestoreBtn" Click="MaxRestoreBtn_Click" Width="30" Grid.Column="4" Style="{DynamicResource DefaultButton}" Background="{DynamicResource Background2}" FontFamily="..\Fonts\#FluentSystemIcons-Regular" Content="&#xFA41;" FontSize="14" Margin="0 0 5 0"/>
+            <Button Foreground="{DynamicResource Foreground1}" x:Name="CloseBtn" Click="CloseBtn_Click" Width="30" Grid.Column="5" Style="{DynamicResource DefaultButton}" Background="{DynamicResource Background2}" FontFamily="..\Fonts\#FluentSystemIcons-Regular" Content="&#xF36A;" FontSize="14"/>
 		</Grid>
 	</Border>
 </UserControl>

PermaTop/UserControls/WindowPropertyItem.xaml.cs

@@ -82,6 +82,8 @@ private void FavBtn_Click(object sender, RoutedEventArgs e)
 
 	private const int WM_SYSCOMMAND = 0x0112;
 	private const int SC_CLOSE = 0xF060;
+	private const int SC_MAXIMIZE = 0xF030;
+
 
 	[DllImport("user32.dll")]
 	private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
@@ -94,4 +96,14 @@ private void CloseBtn_Click(object sender, RoutedEventArgs e)
 		}
 		catch { }
 	}
+
+	private void MaxRestoreBtn_Click(object sender, RoutedEventArgs e)
+	{
+		if (!Global.IsWindowMaximized(WindowInfo.Hwnd))
+		{
+			SendMessage(WindowInfo.Hwnd, WM_SYSCOMMAND, (IntPtr)SC_MAXIMIZE, IntPtr.Zero);
+
+			return;
+		}
+	}
 }