I met the similar problem. Once I wrote a program for retrieving images from a website and I want that users can be notified about the downloading process, so I added a status bar on main GUI, and let the downloading process works on the other thread(let's say B), when it is retrieving the images , the B has to report its status to GUI which is on main thread(let's say A). But B can not access the status bar which belongs to A. So there is a method call BeginInvoke(xxxx); With this method, it enables B to access resourses on A. So I think it should be the answer that you are looking for. Give me reply whatever it works or not :) cheers

hello guys, I am a beginner.I am interesting in Aforge.net.It is a really fantanstic framework~! I want to know how to use AForge.net in C# to connect to a Camera.I found the Motion_Detection article but it's too diffcult to me.I can not to understand it.~_~; So what I want to know is just a very simple example to show how to connect to a camera and get a image from the camera. Thanks~! I am really really really really eager to know the answer asap. MSN:franva008@hotmail.com :confused: now this is my code: private void button1_Click(object sender, EventArgs e) { // enumerate video devices AForge.Video.DirectShow.FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); // create video source VideoCaptureDevice videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString); //VideoCaptureDevice videoSource = new VideoCaptureDevice("Acer HD Crystal Eye webcam"); // set NewFrame event handler videoSource.NewFrame += new NewFrameEventHandler( video_NewFrame ); // start the video source videoSource.DesiredFrameRate = 25; videoSource.DesiredFrameSize = new Size(pictureBox1.Width, pictureBox1.Height); videoSource.Start( ); } private void video_NewFrame(object sender, NewFrameEventArgs eventArgs) { // get new frame //Bitmap bitmap = eventArgs.Frame; pictureBox1.Image = (Image)((object)bitmap); //pictureBox1.Image = (Image)eventArgs.Frame; // process the frame } Error message:invalue Parameters

modified on Saturday, December 13, 2008 11:31 AM