Remote Display Application is a Windows Embedded CE application that allows you to remotely access  to a target device using your development workstation, similar to Remote Desktop Connection for Windows XP, Windows Vista, and Windows 7. Remote Display Application is only available up to Windows Embedded Compact 7 and Windows Embedded Compact 2013 is no longer featured. The Remote Display Application tools comes in two parts, a server and a client.

The Server
The CERHOST is an application specifically for a Windows Embedded CE development workstation and it must be launched before the client. The Remote Display Application (CERHOST) can be found in the following folder.
C:\WINCE600\PUBLIC\COMMON\OAK\BIN\I386

The Client
The CERDisp is the Windows Embedded CE client  and must be included in the OS Runtime Image by selecting Remote Display Application component  to your OS Design Project. It is not necessary to launch the Remote Display Application automatically but is a good practice to learn so that you do not have to launch it manually every time you need to use it.
The AutoLaunch Component will help you launch cerdisp automatically by adding the following registry to the project.reg

[HKEY_LOCAL_MACHINE\Startup]
  "Process0"="Cerdisp -c"
  "Process0Delay"=dword: 00001388

The above registry entry means that the cerdisp -c will launch 5 seconds after Windows Embedded CE 6.0 OS Runtime starts.
After you have added the following and created an OS Runtime Image for your target device. Once the OS Runtime has been loaded, open CerHOST and select File | Connect, another box will show and the following description will show

Click on OK to continue and you will see the target device's desktop on your development workstation.

that should do it. You have just learned how to use Remote Display Application for Windows Embedded CE, this works with CE 6.0 and Compact 7.