private void _btnOK_Click(object sender, System.EventArgs e) { RasterImageFormat format = RasterImageFormat.Tif; string baseFileName = ""; bool multiPage = true; int bpp = 1; switch (_transferMode) { case TwainTransferMode.File: format = _format[_cmbFileFormats.SelectedIndex]; if (!_cmbFileFormats.Text.Equals("TIFF MULTI")) { multiPage = false; } break; case TwainTransferMode.Buffer: if (_cbUseBufferSize.Checked && _txtBufferSize.Text == "0") { Messager.ShowError(this, "Please, enter valid custom buffer size"); return; } format = _format[_cmbFileFormats.SelectedIndex]; bpp = _memoryFormatBPP[_cmbFileFormats.SelectedIndex]; multiPage = _memoryFormatMulti[_cmbFileFormats.SelectedIndex]; break; case TwainTransferMode.Native: format = _imageLEADFormat; bpp = _nativeBPP; break; } Hide(); try { _session.EnableAcquireMultiPageEvent = false; baseFileName = _txtFileName.Text; _session.AcquireFast(baseFileName, TwainFastUserInterfaceFlags.Show | TwainFastUserInterfaceFlags.Modal, _transferMode, format, bpp, multiPage, _bufferSize, !_cbUseBufferSize.Checked); Messager.ShowInformation(this, "Process Completed"); } catch (Exception ex) { Messager.ShowError(this, ex); } DialogResult = DialogResult.OK; }