text: The tool can be used as a short cut for launching applications using mouse.
  There aren't many technical things to tell in this article. Most of the things are available on the Internet and I searched and used them. I will give the links in this article.
  The techniques used are:
  Thanks to Stephen Toub for the useful article on how to hook the mouse in C#.
  After starting the application, the application will run in the background. To view the tool:
  4x4 matrix buttons will appear on the screen. Now set each button for launching the new application. To do that:
  On the menu, select "Setting". The below dialog will open:
  After the matrix of buttons is visible, clicking anywhere on the screen will hide it. Middle click will also hide the matrix of buttons.
  Please follow the above article for the mouse hook process.
  The main window has two delegates that will be called by the mouse hook methods.
  One for show and hide the window.
  ShowHide(int x, int y) will show or hide the window in mouse middle click.
  The second one is for scrolling the window.
  ScrollIcon() will increase the page number of the window.
  private)); //Console.WriteLine(hookStruct.pt.x + ", " + hookStruct.pt.y); showhide(0,0); } else if (nCode >= 0 && MouseMessages.WM_MBUTTONDOWN == (MouseMessages)wParam) { MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT) Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT)); showhide(hookStruct.pt.x, hookStruct.pt.y); return (IntPtr)(-1); } else if (nCode >= 0 && MouseMessages.WM_MOUSEWHEEL == (MouseMessages)wParam) { if (scrolIcon() == true) { return (IntPtr)(-1); } } return CallNextHookEx(_hookID, nCode, wParam, lParam); }
  The second part to consider in the tool is a transparent window containing a matrix of buttons.To make a transparent window in WPF is very simple. Below is the XAML code. Make
  AllowsTransparency = true and
  Background='Transparent".
  <Window x:
  The following code is used to get the icons from the file name:
  [DllImport("Shell32.dll")] public extern static int ExtractIconEx(string libName, int iconIndex, IntPtr[] largeIcon, IntPtr[] smallIcon, int nIcons); public static Icon GetIconFromPath(string filePath) { int numIcons = 10;//if you want 10 icons for example IntPtr[] largeIcon = new IntPtr[numIcons]; IntPtr[] smallIcon = new IntPtr[numIcons]; //retrieve icon from array Icon smallIco = null; try { if (Directory.Exists(filePath) == true) { ExtractIconEx("shell32.dll", 0, largeIcon, smallIcon, numIcons); smallIco = System.Drawing.Icon.FromHandle(smallIcon[4]); } else { ExtractIconEx(filePath, 0, largeIcon, smallIcon, numIcons); smallIco = System.Drawing.Icon.FromHandle(smallIcon[0]); } } catch (Exception) { } return (smallIco); }
  To put the icon on the button, declare each button with an image as below. Get the
  System.Drawing.icon for the file using the above code. Create a bitmap from the icon and assign the
  image.Source property as shown in the code below:
  <Button Name="P1_Btn00" Grid. <Image Name="IC_Btn00" Stretch="None" /> </Button>
  btnIcon = GetIcon.GetIconFromPath(btnInfo.Path); Bitmap bmp = btnIcon.ToBitmap(); MemoryStream strm = new MemoryStream(); bmp.Save(strm, System.Drawing.Imaging.ImageFormat.Png); strm.Seek(0, SeekOrigin.Begin); PngBitmapDecoder pbd = new PngBitmapDecoder (strm, BitmapCreateOptions.None, BitmapCacheOption.Default); btnImage.Source = pbd.Frames[0];
  I know there is nothing much in the code. I put it just to get some comments on the tool for its improvement. I would also like some ideas to use it in Notebook.
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