Compare Picture

I am creating a remote assistance program similiar to VNC and GotoMyPC, and I need a solution for "streaming" the desktop image to the client (viewer). The best option in my opinion is to take constant screenshots, and compare the two images to find differences, and then transmit only those changed parts to the client. The client would then take that image piece and "put it back together" with the rest of the image. I would simply like an ActiveX control that can capture the screenshot into 2 pictureboxes, and then compare them and output the changed parts in a single .bmp file (256 colors). (I HAVE THE CODE NEEDED TO SAVE AS 256 COLOR BMP) That is all of the functionality it needs, but I also need some way of knowing the coordinates to place the "piece" back into the original image, so I will leave that part up for you to decide. This control will be used in the "Server" side of the application, the side which transmits the image to the client. I will be coding the rest of the functionality myself, all that is needed is that compare method. Speed is the most important part of this project, so please send me a small demonstration with just the compare picture routine, nothing else is required. P.S. - The control could have an event such as: Event ScreenSaved(...Coordinates here...) That would be sufficient enough for retreiving the coordinates for the new image piece. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Exclusive and complete copyrights to all work purchased. (No GPL, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site). ## Platform Windows 98 Windows 98 SE Windows ME Windows 2000/NT Windows XP Professional Edition Windows XP Home Edition