https://manpages.ubuntu.com/manpages/xenial/man3/XmVaCreateManagedForm.3.html
Ubuntu Manpage: XmVaCreateForm, XmVaCreateManagedForm - A Form widget convenience creation...
A Form widget convenience creation functions. "XmVaCreateForm" "XmVaCreateManagedForm" "creation functions" "XmVaCreateForm"
a formubuntumanpagewidgetconvenience