getting Image at design time embedded to custom control dll

Hi to Everybody, I want to get image at design time for a custom control, I am developing. For that I am getting image but that image must be added to the application where I test the control. Can any one tell me how I can get the image which should be embedded with the control itself, no need to add in the application. So that if I drag the control to the page, image will come automatically at design time. Thanks & Regards, Rajeev