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POReleasing memory by the resource
 

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    <p>I have a program in c# which uses my local webcam, to capture and store images. I have buttons to click on start,stop,continue n etc.When I run the program it works properly for the first time after I turn my system on, but in the consecutive executions of the same thing I get an error (in pop-up window):</p> <blockquote> <p>An error occurred while capturing the video image. The video capture will now be terminated. Object reference not set to an instance of the object.</p> </blockquote> <p>for which I assume that it might be because of the camera device, not releasing the memory it used. So how do I programatically free it up, when I click on the exit button? Below is part of the program and i get error in the webcam.start(0) method</p> <p>namespace WinFormCharpWebCam {</p> <pre><code>class WebCam { private WebCamCapture webcam; private System.Windows.Forms.PictureBox _FrameImage; private int FrameNumber = 30; public void InitializeWebCam(ref System.Windows.Forms.PictureBox ImageControl) { webcam = new WebCamCapture(); webcam.FrameNumber = ((ulong)(0ul)); webcam.TimeToCapture_milliseconds = FrameNumber; webcam.ImageCaptured += new WebCamCapture.WebCamEventHandler(webcam_ImageCaptured); _FrameImage = ImageControl; } void webcam_ImageCaptured(object source, WebcamEventArgs e) { _FrameImage.Image = e.WebCamImage; } public void Start() { webcam.TimeToCapture_milliseconds = FrameNumber; webcam.Start(0); //error pops up when the execution comes to this method } public void Stop() { webcam.Stop(); } public void Continue() { // change the capture time frame webcam.TimeToCapture_milliseconds = FrameNumber; // resume the video capture from the stop webcam.Start(this.webcam.FrameNumber); } public void ResolutionSetting() { webcam.Config(); } public void AdvanceSetting() { webcam.Config2(); } } </code></pre> <p>}</p>
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    1. CORead the [FAQ] and post some relevant code and information. Or reboot your computer before running the program.
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    2. CODon't make assumptions about errors, debug them. Pinpoint the source of the exception by adding breakpoints and try..catch clauses.
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    3. COI have added the code where I get the specified error.Try t help me out in this ! Thanks
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