editor bottom toolbar

I have been searching for a way to hide the bottom toolbar for the editor. I keep seeing to add this to the css file...

.ajax__htmleditor_editor_bottomtoolbar {
    display:none;
}

I have added it, but can not figure out how to use it from the codebehind page to toggle the bottom toolbar on/off. I am using VB as language. Could someone help with an example please?