C# - Drag Drop Resize Pictureboxes over a picturebox

Project Description:
This is a C# GDI+ small application where I would like to create a new picture combining images and text using drag and drop.

Here is the screenshot of what I want that mainly includes

(1) Dragging and dropping pictureboxes to a new picturebox.
(2) Repositioning (Panning) the images using mouse
(3) Resizing image using mouse
(4) Adding text to image
(5) Save Image

http://www.lixli.com/explain-requirements.jpg

and here is a sample output

http://www.lixli.com/sample-output.jpg