SHELL Command and Notepad.exe

I had trouble executing the Notepad.exe from Navision 4.0 and read some fine alternatives in this forum how to solve the issue about Navision 4.0 not containing the path to notepad.exe which doesent want to run without the full path.
I have solved the problem a little different, and here are the examples:

From C/SIDE Referenceguide:
SHELL('C:\Windows\notepad.exe','C:\MyTextFile.txt');
[-X

To avoid the full path:

WinDir := ENVIRON('windir');
SHELL(WinDir+'\notepad.exe','C:\MyTextFile.txt');
\:D/

Hope this is usefull.