gambas3-gb-form-dialog software package provides Gambas native mdi form component, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gambas3-gb-form-dialog
gambas3-gb-form-dialog is installed in your system.
Make ensure the gambas3-gb-form-dialog package were installed using the commands given below,
$ sudo dpkg-query -l | grep gambas3-gb-form-dialog *
You will get with gambas3-gb-form-dialog package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | gambas3-gb-form-dialog |
| Version | 3.1.1-2.2ubuntu4 |
| Description | Gambas native mdi form component |
| Sub Section | libdevel |