Hi there I would like to make a script somehow interactive. For example let’s say I would like to create a very simple script. When I click with the mouse on the viewport a cube object will be added to the scene.
I would like more information based on relative subjects, and about available mouse input events.
Use the Object→Action→Settings paradigm, and Blender will do most of the hard work for you.
More details here http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Advanced_Tutorials/Python_Scripting/Object,_Action,_Settings_New. If in doubt, start from the beginning, here http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Advanced_Tutorials/Python_Scripting/Introduction_New.