Creating a Basic LEADTOOLS Multimedia Capture Application

Take the following steps to create and run a multimedia capture application using the LEADTOOLS Multimedia CaptureCtrl control.

Start Visual Studio .NET.
Choose File->New->Project... from the menu.
In the New Project dialog box, choose either "Visual C# Projects" or "Visual Basic Projects" in the Projects Type List, and choose "Windows Application " in the Templates List.
Type the project name as "Multimedia Capture" in the Project Name field, and then choose OK. If desired, type a new location for your project or select a directory using the Browse button, and then choose OK.
In the "Solution Explorer" window, right-click on the "References" folder, and select "Add Reference..." from the context menu. In the "Add Reference" dialog box, select the ".NET" tab and select Leadtools.Multimedia and click OK. If this dll does not appear under the .NET tab, you will need select the Browse tab and add it from the "<LEADTOOLS_INSTALLDIR>\Bin\DotNet\Win32 " folder, by selecting the following DLL:
- Leadtools.Multimedia.dll
After browsing, click the Select button and then press the OK button to add the above DLL to the application.
Make sure Form1 is in design view. Go to the toolbox (View->Toolbox) and drag and drop a CaptureCtrl control on the form. NOTE: If you do not have CaptureCtrl in your toolbox, select Tools->Choose Toolbox Items from the menu. Click Browse and then select Leadtools.Multimedia.dll from "<LEADTOOLS_INSTALLDIR>\Bin\DotNet\Win32" and then click Open and then click OK. After adding it to the form, set the following properties on the capture control:
PropertyValueName_capturectrlAnchorTop, Bottom, Left, Right
Go to the toolbox (View->Toolbox) and drag and drop a ProgressBar control on the form (below the capture control) and set the following properties:
PropertyValueName_progressAnchorBottom, Left, Right
Go to the toolbox (View->Toolbox) and drag and drop a Button control on the bottom of the form and set the following properties:
PropertyValueName_buttonCaptureTextCaptureAnchorBottom, Right
Switch Form1 to code view (right-click Form1 in the solution explorer then select View Code) and add the following lines at the beginning of the file:
[Visual Basic]
```
            Imports Leadtools.Multimedia
            
```
[C#]
```
            using Leadtools.Multimedia;
            
```

Declare the following private variables:

[Visual Basic]

            Private _targetFile As String
            Private _captureTime As Integer

[C#]

            private string _targetFile;
            private int _captureTime;

Add an event handler to the Form1 Load event and code it as follows:

[Visual Basic]

            Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
               If (_capturectrl.VideoDevices.Count = 0) Then
                  Throw New Exception("No capture devices available")
               End If
                  
               _capturectrl.VideoDevices(0).Selected = True
               _capturectrl.VideoCompressors.Mpeg2.Selected = True
               
               _targetFile = "capture.avi"
               _captureTime = 30
            End Sub

[C#]

            private void Form1_Load(object sender, System.EventArgs e)
            {
               if (_capturectrl.VideoDevices.Count == 0)
                  throw new Exception("No capture devices available");
                  
               _capturectrl.VideoDevices[0].Selected = true;
               _capturectrl.VideoCompressors.Mpeg2.Selected = true;
               
               _targetFile = "capture.avi";
               _captureTime = 30;
            }

Add an event handler to the _capturectrl Progress event and code it as follows:

[Visual Basic]

            Private Sub _capturectrl_Progress(ByVal sender As System.Object, ByVal e As ProgressEventArgs) Handles _capturectrl.Progress
               _progress.Value = CInt((_progress.Maximum * e.time) / (_captureTime * 1000))
            End Sub

[C#]

            private void _capturectrl_Progress(object sender, ProgressEventArgs e)
            {
               _progress.Value = (int)((_progress.Maximum * e.time) / (_captureTime * 1000));
            }

Add an event handler to the _capturectrl Complete event and code it as follows:

[Visual Basic]

            Private Sub _capturectrl_Complete(ByVal sender As System.Object, ByVal e As EventArgs) Handles _capturectrl.Complete
               MessageBox.Show("Capture Complete")
               _buttonCapture.Enabled = True
            End Sub

[C#]

            private void _capturectrl_Complete(object sender, EventArgs e)
            {
               MessageBox.Show("Capture Complete");
               _buttonCapture.Enabled = true;
            }

Add an event handler to the _buttonCapture Click event and code it as follows:

[Visual Basic]

            Private Sub _buttonCapture_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles _buttonCapture.Click
               Try
                  _capturectrl.Preview = True
                  _capturectrl.TargetFile = _targetFile
                  _capturectrl.UseTimeLimit = True
                  _capturectrl.TimeLimit = _captureTime
                  
                  _capturectrl.StartCapture(CaptureMode.Video)
                  _buttonCapture.Enabled = False
               Catch ex As Exception
                  MessageBox.Show(ex.Message)
               End Try
            End Sub

[C#]

            private void _buttonCapture_Click(object sender, System.EventArgs e)
            {
               try
               {
                  _capturectrl.Preview = true;
                  _capturectrl.TargetFile = _targetFile;
                  _capturectrl.UseTimeLimit = true;
                  _capturectrl.TimeLimit = _captureTime;
                  
                  _capturectrl.StartCapture(CaptureMode.Video);
                  _buttonCapture.Enabled = false;
               }
               catch (Exception ex)
               {
                  MessageBox.Show(ex.Message);
               }
            }

Build, and Run the program to test it.

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Creating a Basic LEADTOOLS Multimedia Capture Application