From
here I can see that the Hyperlink does not support the file name with parameters method. And you could do a work around with the macro button
1. Open the VBA Editor by pressing the ALT+F11 Button
2. Create a small sub to open the macro
Sub OpenNotepad()
Shell ("notepad.exe C:\Temp.txt")
End Sub
'This Tell the winword that open the macro in single button click
Private Sub Document_New()
Application.Options.ButtonFieldClicks = 1
End Sub
3. Close the VBA Editor
4. And in the Document window Press Ctrl+F9
5. This will place the Macro button tag in the document as
{}
6. Now type the text as
Where
MacroButton is the keyword to place the macro button
OpenNotepad is the MacroName
Open notepad is the Display Text
7. Now Right Click the Inserted button and select the Toggle field option
8. Now you will see "Click Here to Open NotePad" option
9.Press Ctrl+Shift+S option and from the style select the HyperLink
10. Now you link, Press the button. This will open the Notepad
11. I have use the Shell Function of Word VBA to open External Application
Sample file