Create a Custom Field Type from a Custom Picker

http://www.ilikesharepoint.de/2013/03/sharepoint-2010-create-a-custom-picker-with-dialog/
http://www.ilikesharepoint.de/2013/03/sharepoint-2010-create-custom-fieldtype-with-picker-dialog/

A person who is very new to SharePoint development will not be able to quickly understand these articles. Hopefully I'll have time to re-write these articles and make it easy to understand for beginners.

Creating a Custom Picker

Here is an article on how to create a custom picker: https://www.premierpointsolutions.com/training/help-and-how-to-articles/create-a-custom-picker-in-sharepoint-2010/

Opening the downloaded sample code will produce this error: Solution file '%s' cannot be migrated because the solution cannot be checked out from source code control. To migrate the solution, make sure the solution file can be checked out and re-open it.

The solution is to remove the READ ONLY attribute of all of the files and folder.

Beginning Sharepoint

The best way to begin is to get some good books: http://it-ebooks.info/tag/sharepoint/

You can start in this order:

1. SharePoint For Dummies
2. Microsoft SharePoint Inside Out 
3. SharePoint User's Guide, 4th Edition
4. Beginning SharePoint Development
5. Microsoft SharePoint Developer Reference
6. Professional SharePoint Development