How to open a program into a XAML c# window -

i using visual studio 2015 rc (wpf application c#) , want program open of apps (with click of button) app window, code below unfinished.

the problem happens when click button, notepad opens randomly in it's own window, , not in app's canvas.

main.window.xaml:

<window x:class="stackoverflowquestion1.mainwindow"     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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"     xmlns:local="clr-namespace:stackoverflowquestion1"     mc:ignorable="d"     title="mainwindow" height="350" width="525"> <grid>     <grid.columndefinitions>         <columndefinition width="0*"/>         <columndefinition/>     </grid.columndefinitions>     <menu x:name="menu" horizontalalignment="left" height="22" margin="2,10,0,0" verticalalignment="top" width="497" grid.column="1">         <button x:name="button" click="button_click" width="187">click here open notepad below</button>     </menu>     <canvas grid.columnspan="2" horizontalalignment="left" height="257" margin="10,52,0,0" verticalalignment="top" width="489" background="black"/>  </grid></window> 

mainwindow.xaml.cs:

using system; using system.collections.generic; using system.diagnostics; using system.linq; using system.text; using system.threading.tasks; using system.windows; using system.windows.controls; using system.windows.data; using system.windows.documents; using system.windows.input; using system.windows.media; using system.windows.media.imaging; using system.windows.navigation; using system.windows.shapes;  namespace stackoverflowquestion1 {  public partial class mainwindow : window {     public mainwindow()     {         initializecomponent();     }       private void button_click(object sender, routedeventargs e)     {         process.start("notepad.exe");     }   } } 

found answer, here code:

using system; using system.diagnostics; using system.runtime.interopservices; using system.threading; using system.windows.forms;  namespace windowsformsapplication1 { public partial class form1 : form {     public form1()     {         initializecomponent();     }      private void button1_click(object sender, eventargs e)     {         process p = process.start("notepad.exe");         p.waitforinputidle(); // allow process open it's window         setparent(p.mainwindowhandle, this.handle);     }      [dllimport("user32.dll")]     static extern intptr setparent(intptr hwndchild, intptr hwndnewparent); } } 

final notes, used windows forms application c#, not windows wpf application, phew im glad found answer haha gl everyone