set a background image to my control

[Sasuko]

Hi all, i want to create a control that does just like a panel into Visual Studio. If i want to set a background image i go on open file dialog at the voice background image and load the image. I know how create this property for my cotnrol but when i laod the image it doesn't is set in my resource project directory as Visual Studio does. How can i do it in design time?