This is just some quick'n'dirty code to test the basics.
Look at the event handler for button2.
I did the same also with the TWAIN toolkit from LEAD, no problems there.
Before I gave up on it, I also tried to write a TWAIN module myself, so I guess the problem lies somewhere in your processing/routing of the WINMSG through the DSM.
Regards,
Gunther
Code: Select all
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using GdPicture;
namespace GDTwainTest
{
public partial class Form1 : Form
{
private GdPicture.GdPictureImaging gd = new GdPicture.GdPictureImaging();
private string sourceName = string.Empty;
public Form1()
{
InitializeComponent();
Text = "GDScanTest";
gd.SetLicenseNumber("REMOVED");
gdViewer1.SetLicenseNumber("REMOVED");
button2.Enabled = button3.Enabled = false;
}
private void EnableButtons(bool enabled)
{
button1.Enabled = button2.Enabled = button3.Enabled = enabled;
}
private void ClearImage()
{
gdViewer1.Clear();
gdViewer1.Update();
}
private void button1_Click(object sender, EventArgs e)
{
bool rv = gd.TwainSelectSource(Handle);
if (rv)
{
sourceName = gd.TwainGetDefaultSourceName(Handle);
Text = "GDScanTest :: " + sourceName;
EnableButtons(true);
}
}
private void button2_Click(object sender, EventArgs e)
{
ClearImage();
EnableButtons(false);
gd.TwainOpenSource(Handle, sourceName);
gd.TwainSetHideUI(false);
gd.TwainSetIndicators(true);
int picId = gd.TwainAcquireToGdPictureImage(Handle);
gd.TwainCloseSource();
if (picId != 0)
{
gdViewer1.DisplayFromGdPictureImage(picId);
}
EnableButtons(true);
}
private void button3_Click(object sender, EventArgs e)
{
ClearImage();
EnableButtons(false);
gd.TwainOpenSource(Handle, sourceName);
gd.TwainSetHideUI(true);
gd.TwainSetIndicators(false);
gd.TwainSetPixelType(GdPicture.TwainPixelType.TWPT_RGB);
gd.TwainSetBitDepth(24);
gd.TwainSetXferCount(1);
gd.TwainSetResolution(300);
gd.TwainSetImageLayout(1, 0.5, 5, 3);
int picId = gd.TwainAcquireToGdPictureImage(Handle);
gd.TwainCloseSource();
if (picId != 0)
{
gdViewer1.DisplayFromGdPictureImage(picId);
}
EnableButtons(true);
}
}
}
