One of the nice things of Windows Mobile Phone having APIs that are shared with the desktop operating system is that many of the publications made for the desktop are applicable to the device's OS. One such resouce that I have is the "Windows 2000 Graphics API Black Book." The book is full of both discussions of the Windows Graphic APIs and solutions based on them many of which run fine on Windows Mobile Phone. Best of all if you want to get the book now you can get it used for as low as 11 USD or new for about 25 USD. Amazon shows about 29 copies of this book in stock. I encourage every one to get a copy.