Well you can create/edit a form in a view class file(located at /view folder or admincp/view folder), and use Mysidia's Form or FormBuilder class. Below is an example of how to use the form builder:
PHP Code:
$form = new FormBuilder("login", "", "post");
$form->buildComment("username: ", FALSE)
->buildTextField("username")
->buildComment("password: ", FALSE)
->buildPasswordField("password", "pass", "", TRUE)
->buildButton("Submit", "submit", "submit");
The above example creates a login form, similar to Mysidia's login form. You can look into the file class_form.php and class_formbuilder.php to see what methods these classes have for you to create a form dynamically.