zhao：1增加鼠标操作类。2修改录制区域大小，解决小屏幕笔迹拉伸及错位问题，3录屏批注时右键取消录屏时激活鼠标下的页面。

Common/Common.csproj

     <Compile Include="system\DataProvider.cs" />
     <Compile Include="system\KeyboardHookCommon.cs" />
     <Compile Include="system\LatticeFileHelper.cs" />
+    <Compile Include="system\MouseEventCommon.cs" />
     <Compile Include="system\PdfTrunImage.cs" />
     <Compile Include="system\BlackboardNew.cs" />
     <Compile Include="system\CameraHelper.cs" />

Common/system/MouseEventCommon.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Common.system
+{
+    public class MouseEventCommon
+    {
+        //[DllImport("user32.dll")]
+        //static extern void mouse_event(MouseEventFlag flags, int dx, int dy, uint data, UIntPtr extraInfo);
+
+        [DllImport("user32")]
+        private static extern int mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);
+        /// <summary>
+        /// 设置鼠标的坐标 
+        /// </summary>
+        /// <param name="x">横坐标</param>
+        /// <param name="y">纵坐标</param>
+        /// <returns></returns>
+        [DllImport("user32.dll")]
+        public static extern int SetCursorPos(int x, int y);
+        
+        /// <summary>   
+        /// 获取鼠标的坐标   
+        /// </summary>   
+        /// <param name="lpPoint">传址参数，坐标point类型</param>   
+        /// <returns>获取成功返回真</returns>   
+
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        public static extern bool GetCursorPos(out POINT pt);
+
+        /// <summary>
+        /// 鼠标点击左键
+        /// </summary>
+        /// <param name="dx">坐标x</param>
+        /// <param name="dy">坐标Y</param>
+        /// <param name="data"></param>
+        public static void MouseLefClickEvent(int dx, int dy, int data)
+        {
+            GetCursorPos(out POINT pointRecord);
+            mouse_event((int)MouseEventFlag.MiddleDown, pointRecord.X, pointRecord.Y, data, 0);
+            mouse_event((int)MouseEventFlag.MiddleUp, pointRecord.X, pointRecord.Y, data, 0);
+        }
+        public static void MouseText(int dx, int dy)
+        {
+            mouse_event((int)MouseEventFlag.LeftDown, dx, dy, 0, 0);
+            mouse_event((int)MouseEventFlag.LeftUp, dx, dy, 0, 0);
+        }
+        /// <summary>
+        /// 鼠标点击中中键
+        /// </summary>
+        /// <param name="data"></param>
+        public static void MouseMiddleClickEvent(int data)
+        {
+            GetCursorPos(out POINT pointRecord);
+            mouse_event((int)MouseEventFlag.MiddleDown, pointRecord.X, pointRecord.Y, data, 0);
+            mouse_event((int)MouseEventFlag.MiddleUp, pointRecord.X, pointRecord.Y, data, 0);
+        }
+
+        public struct POINT
+        {
+            public int X;
+            public int Y;
+            public POINT(int x, int y)
+            {
+                this.X = x;
+                this.Y = y;
+            }
+
+        }
+
+        enum MouseEventFlag : uint
+        {
+            //移动鼠标 
+            Move = 0x0001,
+            //模拟鼠标左键按下 
+            LeftDown = 0x0002,
+            //模拟鼠标左键抬起 
+            LeftUp = 0x0004,
+            //模拟鼠标右键按下 
+            RightDown = 0x0008,
+            //模拟鼠标右键抬起 
+            RightUp = 0x0010,
+            //模拟鼠标中键按下 
+            MiddleDown = 0x0020,
+            //模拟鼠标中键抬起 
+            MiddleUp = 0x0040,
+            XDown = 0x0080,
+            XUp = 0x0100,
+            Wheel = 0x0800,
+            VirtualDesk = 0x4000,
+            //标示是否采用绝对坐标 
+            Absolute = 0x8000
+        }
+    }
+}

XHWK.WKTool/PracticeWindow.xaml.cs

-using System;
+using Common.system;
+using System;
 using System.Collections.Generic;
 using System.Threading;
 using System.Windows;
             }
             Hide();
         }
+        /// <summary>
+        /// 鼠标中建点击
+        /// </summary>
+        void SwitchPages()
+        {
+            try
+            {
+                new Thread(() =>
+                {
+                    Thread.Sleep(500);
+                    MouseEventCommon.MouseMiddleClickEvent(0);
+                }).Start();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message);
+            }
+        }
+
 
         private void blackboard_canvas_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
         {
                 APP.W_ScreenRecordingToolbarWindow.flg = 1;
             }
             ReturnPractice();
+            //模拟切到ppt
+            SwitchPages();
             //Hide();
         }
         /// <summary>

XHWK.WKTool/ScreenRecordingToolbarWindow.xaml.cs

 
 using System;
 using System.IO;
+using System.Runtime.InteropServices;
 using System.Threading;
 using System.Windows;
 using System.Windows.Forms;
             borOne.Background = new SolidColorBrush(Colors.DodgerBlue);
             borTwo.Background = new SolidColorBrush(Colors.DodgerBlue);
         }
+
+        /// <summary>
+        /// 切换页面
+        /// </summary>
+        void SwitchPages()
+        {
+            //SendKeys.SendWait("%{TAB}");
+            MouseEventCommon.MouseMiddleClickEvent(0);
+        }
+
     }
 }

XHWK.WKTool/XHMicroLessonSystemWindow.xaml

         xmlns:local="clr-namespace:XHWK.WKTool"
         mc:Ignorable="d"
         Title="星火微课系统" Height="1036" Width="1290" 
-    WindowStyle="None"  WindowStartupLocation="CenterScreen"  AllowsTransparency="True"  Background="Transparent"    ShowInTaskbar="True" ResizeMode="CanMinimize" BorderThickness="7" MouseLeftButtonDown="Window_MouseLeftButtonDown_1">
+    WindowStyle="None"  WindowStartupLocation="CenterScreen"  AllowsTransparency="True"  Background="Transparent"    ShowInTaskbar="True" ResizeMode="CanMinimize" BorderThickness="7" MouseLeftButtonDown="Window_MouseLeftButtonDown_1" Loaded="Window_Loaded">
     <Window.Effect>
         <DropShadowEffect BlurRadius="10" Color="#bababa" Direction="80" ShadowDepth="0"/>
     </Window.Effect>
             <Border  Grid.Row="1">
                 <Grid Grid.Row="1" x:Name="GridMain" Visibility="Visible" MouseLeftButtonDown="Window_MouseLeftButtonDown_1">
                     <ScrollViewer x:Name="scroMain" VerticalScrollBarVisibility="Visible" MouseLeftButtonDown="Window_MouseLeftButtonDown_1">
-                        <Grid x:Name="gridM"  Margin="0,0,0,0" Background="#FFFFFF" Visibility="Visible" Height="1780" MouseLeftButtonDown="Window_MouseLeftButtonDown_1">
+                        <Grid x:Name="gridM"  Margin="0,0,0,0" Background="#FFFFFF" Visibility="Visible" Width="auto" Height="1780" MouseLeftButtonDown="Window_MouseLeftButtonDown_1">
                             <Grid>
                                 <Border Grid.Row="1"  CornerRadius="5">
                                     <Grid x:Name="IMG" Margin="0,0,0,0">
                                     </Canvas>
                                 </Grid>
                             </Border>
-                        </Grid>
-                        <Image x:Name="imgDocumentation" Visibility="Visible" VerticalAlignment="Top" Stretch="Fill"/>
-                        <Image x:Name="imgPPT" Visibility="Visible" VerticalAlignment="Top"/>
+                            </Grid>
+                            <Image x:Name="imgDocumentation" Visibility="Visible" Stretch="Fill"/>
+                            <!--<Grid Width="auto" Height="auto" HorizontalAlignment="Center" VerticalAlignment="Center">
+                                <Border BorderBrush="#FF171515" BorderThickness="2">
+                                    <Image x:Name="imgDocumentation" Visibility="Visible" Stretch="Fill"/>
+                                </Border>
+                            </Grid>-->
+                            <Image x:Name="imgPPT" Visibility="Visible" VerticalAlignment="Top"/>
                         <!--导入图片-->
                         <!--<Button Cursor="Hand" x:Name="btnOk" Height="50" Width="50" Content="√" FontSize="26" Background="#2E8CF0" Foreground="#FFFFFF" Click="btnOk_Click" Visibility="Collapsed"/>-->
                         <InkCanvas Grid.Row="0" x:Name="blackboard_canvas"  Background="Transparent" Visibility="Collapsed" Grid.ColumnSpan="2"/>

XHWK.WKTool/XHMicroLessonSystemWindow.xaml.cs

             //wfhCamera.Visibility = Visibility.Hidden;
             ImgPDFPath = null;
             ImgPDFPath = new string[300];
+            //gridM.Height = gridM.ActualWidth / proportion;
+            //gridM.Height = gridM.Width / proportion;
         }
         /// <summary>
         /// 初始化快捷键
                 HideAngleBorder();
             }
         }
+
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            //调整录制区域宽高
+            double proportion = 210.0 / 297.0;
+            gridM.Height = gridM.ActualWidth / proportion;
+        }
     }
 }