Simple To Do List: Appearance
The options dialog is accessed via the [Tools | Options] menu command.
Using this item from the Options menu you can change the visual style of the program to enjoy all benefits of the Windows Native style. You just need to mark the Native style option in dialog and all program objects will change their visual style in accordance with the chosen option.
Also you have three types of visual style in the Look and Feel menu: Flat, Standart and Ultra Flat.