- 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 "GetFastTwainScan" 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 browse to Leadtools For .NET "<LEADTOOLS_INSTALLDIR>\Bin\DotNet\Win32 " folder and select the following DLLs:
- Leadtools.dll
- Leadtools.Twain.dll
- Leadtools.Codecs.dll
- Leadtools.WinForms.dll
- Go to the toolbox (View->Toolbox) and Drag and drop a 1 instance of Button control to the top of the form and set the following properties for them:
Text Name Acquire buttonAcquire - Switch to Form1 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 Imports Leadtools.Twain Imports Leadtools.Codecs Imports Leadtools.WinForms[C#]using Leadtools; using Leadtools.Twain; using Leadtools.Codecs; using Leadtools.WinForms; - Declare the following private variable:
[Visual Basic]
Private WithEvents twnSession As TwainSession[C#]private TwainSession twnSession; - 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 Try ' Unlock Document support. ' Note that this is a sample key, which will not work in your toolkit. RasterSupport.Unlock(RasterSupportType.Document, "TestKey") twnSession = new TwainSession twnSession.Startup(Me, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None) Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub[C#]private void Form1_Load(object sender, System.EventArgs e) { try { // Unlock Document support. // Note that this is a sample key, which will not work in your toolkit. RasterSupport.Unlock(RasterSupportType.Document, "TestKey"); twnSession = new TwainSession(); twnSession.Startup(this, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None); } catch (Exception ex) { MessageBox.Show(this, ex.Message); } } - Add an event handler to the Form1 Closing event and code it as follows:
[Visual Basic]
Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing Try twnSession.Shutdown() Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub[C#]private void Form1_FormClosing(object sender, FormClosingEventArgs e) { try { twnSession.Shutdown(); } catch (Exception ex) { MessageBox.Show(this, ex.Message); } } - Add an event handler to the buttonAcquire Click event and code it as follows:
[Visual Basic]
Private Sub buttonAcquire_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonAcquire.Click Dim twainCap As TwainCapability = New TwainCapability twnSession.SelectSource(String.Empty) Try twainCap.Information.Type = TwainCapabilityType.FeederEnabled twainCap.Information.ContainerType = TwainContainerType.OneValue Dim enable As Boolean = True twainCap.OneValueCapability.ItemType = TwainItemType.Bool twainCap.OneValueCapability.Value = enable twnSession.SetCapability(twainCap, TwainSetCapabilityMode.Set) MessageBox.Show(Me, "CAP_FEEDERENABLED capability is enabled") ' check if there is document loaded in the feeder twainCap = twnSession.GetCapability(TwainCapabilityType.FeederLoaded, TwainGetCapabilityMode.GetValues) ' check if the selected driver supports duplex capability enable = CType(twainCap.OneValueCapability.Value, Boolean) If enable Then MessageBox.Show(Me, "There is document loaded in the feeder") Else MessageBox.Show(Me, "There is no document loaded in the feeder") End If Catch ex As Exception MessageBox.Show(Me, ex.Message) End Try ' try to acquire pages using CAP_FEEDERENABLED and CAP_FEEDERLOADED capabilities twnSession.Acquire(TwainUserInterfaceFlags.Show Or TwainUserInterfaceFlags.Modal) End Sub[C#]private void buttonAcquire_Click(object sender, System.EventArgs e) { TwainCapability twainCap = new TwainCapability(); twnSession.SelectSource(string.Empty); try { twainCap.Information.Type = TwainCapabilityType.FeederEnabled; twainCap.Information.ContainerType = TwainContainerType.OneValue; bool enable = true; twainCap.OneValueCapability.ItemType = TwainItemType.Bool; twainCap.OneValueCapability.Value = enable; twnSession.SetCapability(twainCap, TwainSetCapabilityMode.Set); MessageBox.Show(this, "CAP_FEEDERENABLED capability is enabled"); // check if there is document loaded in the feeder twainCap = twnSession.GetCapability(TwainCapabilityType.FeederLoaded, TwainGetCapabilityMode.GetValues); // check if the selected driver supports duplex capability enable = (bool)twainCap.OneValueCapability.Value; if (enable) MessageBox.Show(this, "There is document loaded in the feeder"); else MessageBox.Show(this, "There is no document loaded in the feeder"); } catch (Exception ex) { MessageBox.Show(this, ex.Message); } // try to acquire pages using CAP_FEEDERENABLED and CAP_FEEDERLOADED capabilities twnSession.Acquire(TwainUserInterfaceFlags.Show | TwainUserInterfaceFlags.Modal); } - Build, and Run the program to test it.