Hide a file with in another file

1. Create a folder named "Test".
2. Create a file "container.txt" with in "Test" folder.
3. Copy sol.exe from \windows\system32 folder.
4. Paste into "Test" folder.
5. Go to Command Prompt and run the following command
"Type Sol.exe > container.txt:sol.exe"
6. To open hidden file, go to command prompt and run the following command
"start c:\test\container.txt:sol.exe"