I think it's impossible to do it using the built-in button in view/forms.
The only workaround that i can think of is that you can use data label using html expression of your own custom button.
and check the literal mark on the data label
You should also be able to use an image and a Picture Control, i believe it would also have a "click" function.
This way you can create your 'button' in an image editor, or download from and external source and use it within a Picture Control