SourceName Example for C++ 5.0 and later

ILEADRasterTwain_U * pRasterTwain;

HRESULT hr = ::CoCreateInstance(CLSID_LEADRasterTwain_U, NULL, CLSCTX_ALL, IID_ILEADRasterTwain_U, (void **)&pRasterTwain);
if (FAILED(hr) || !pRasterTwain)
{
	::MessageBox (NULL, _TEXT("Failed to create a Raster Twain Object"), _TEXT("Error"), MB_OK);
	return;
}

pRasterTwain->InitSession((long)GetSafeHwnd()); 

CString csBuffer; 
long lCount; 

pRasterTwain->get_SourceCount (&lCount); 
for (long n = 0 ; n < lCount ; n++)
{
	csBuffer.Format(TEXT("Source name = %s"), (TCHAR *)pRasterTwain->GetSourceName(n));
	MessageBox(csBuffer);
}