It depends whether you need to enter these combinations often or not.
You have two approaches:
(1) Select the Danish keyboard in Windows. If your physical keyboard has a different layout, then you need to find out which key on the keyboard types which letter/symbol (thus map the Danish layout to your keyboard), so that you hit the right key.
(2) Find out what the key combination of the symbols you want to type is. You can find out by inserting the symbol in Word and looking at the combination (which Word shows) or google for it.
If you frequently type in Danish, I would consider using a Danish keyboard.