DeviceManager_DeviceCount Property

In This Topic

Description

Gets count of available TWAIN devices.

Property type

Read-only property

Syntax

Visual Basic
Public Property DeviceManager_DeviceCount As Long

Return Type

Count of available TWAIN devices.

Remarks

Call this property after DeviceManager_Open method

Information about error that occurs during getting property value can be get using the Error and ErrorString properties.

Example

This example shows how to get information about available devices.

Example (VB.NET)

Private VSTwain1 As New VintaSoftTwain()


''' <summary>
''' Gets information about devices.
''' </summary>
Private Sub GetDeviceInfo()
    ' open the device manager
    If Not VSTwain1.DeviceManager_Open() Then
        Console.WriteLine(VSTwain1.errorString)
        Exit Sub
    End If

    ' for each device
    For i = 0 To (VSTwain1.DeviceManager_DeviceCount - 1)
        ' output the device name
        Console.WriteLine(VSTwain1.Device_Info_GetProductName(i))
    Next
End Sub