how to get ping command on notepad

If you are just interested in a simple result, i.e. "is the address accessible?", you can start the ping command using system function, and save the returned value:

int ret = system("ping www.devx.com");
The ret value will be zero if the site is accessible.

Instead of system function, which displays a console window, you can use CreateProcess with specific parameters, in order to execute ping in invisible mode.

If you actually need the textual output of ping command, you can look at Creating a Child Process with Redirected Input and Output (http://windowssdk.msdn.microsoft.com/en-us/ms682499.aspx).

Hope it helps.