I noticed when you add a form heading from within the cms you'll get something like:

<label class="FormHeading">Your Details:</label>

but when adding an HeaderField in a custom made form, you'll get an H-tag...

Now with css I can make both look the same, but I want in both my forms this to be the same...

so either with label or either with h-tags...

Furthermore, is there a possibility to add a 'legend'-tag? I believe it might be even better to do
<fieldset><legend>User Details</legend>
// input fields here
</fieldset>

<fieldset><legend>Message</legend>
// more input fields here
</fieldset>