Loading a Data Set (Visual C++ 6.0)

Loading a Data Set (C++ 6.0 and later)

Take the following steps to start a project and to add some code that loads a DICOM Data Set and prints information about the data set.

1.	Start a new project as follows:
	For C++ 6.0, run Microsoft Visual C++ 6.0, select the File >New menu option, and do the following:
	a.	Click the Projects tab.
	b.	Select MFC AppWizard (exe) as the project type
	c.	In the Project name text box, specify dicom.
	d.	In the Location text box, specify the path of the project.
	e.	Click the OK button.
2.	In the Step 1 dialog box, do the following:
	a.	Select Dialog based.
	b.	Click the Next button.
3.	In the Step 2 of 4 dialog box, do the following:
	a.	Ensure that About Box is selected.
	b.	Ensure that 3D Controls is selected.
	c.	Select ActiveX Controls.
	d.	Click the Next button.
4.	In the Step 3 of 4 dialog box, do the following:
	a.	For comments, ensure that Yes, Please is selected.
	b.	For how to use the MFC library, select As a shared DLL.
	c.	Click the Next button.
5.	In the Step 4 of 4 dialog box, just click Finish.
6.	Read New Project Information, and click OK. (The AppWizard creates the project files and opens the project.)
7.	Import the DICOM COM Object type libraries into your projects as follows:
	a.	Copy the \lead\include\l_com.h and ltkey.h files to your project directory.
	b.	In the Project Workspace, click the FileView tab.
	c.	Double-click the dicom files folder to open it.
	d.	Double-click the the Header Files folder to open it.
	e.	Double-click the StdAfx.h file to edit it.
	f.	Add the following lines to the file, just before "AFX_INSERT_LOCATION":

#include "l_com.h"
#import <ltrvr14n.dll> no_namespace, named_guids, exclude("RasterSupportLockConstants")
#import <ltr14n.dll> no_namespace, named_guids, exclude("RasterSupportLockConstants")
#import <ltrvw14n.ocx> no_namespace, named_guids
#import <ltrpr14n.dll> no_namespace, named_guids
#import <ltrio14n.dll> no_namespace, named_guids, exclude("LoadResizeConstants"), exclude("J2KLimitConstants"), exclude("J2KProgressionFlags"), exclude("J2KRegionOfInterest")
#import <LTDicKrn14n.dll> no_namespace, named_guids, exclude("LoadDirectoryFlags")
#import <LTDicDS14n.dll> no_namespace, named_guids, exclude("DicomAnnSaveModifyConstants"), exclude("DicomCommandSetMessagePriorities")
#import <LTDicNet14n.dll> no_namespace, named_guids
#import <LTDPScu14n.dll> no_namespace, named_guids#ifndef MAKETAG
   #define MAKETAG(nGroup,nElement) ((unsigned long)((((unsigned long)nGroup) << 16) | nElement))
   #define GETGROUP(nTag)           ((unsigned short)(nTag >> 16))
   #define GETELEMENT(nTag)         ((unsigned short)(nTag & 0xFFFF))
#endif

8.	Add a LEADDicomDS COM Object to the application as follows:
	a.	In the Project Workspace, click the FileView tab.
	b.	Double-click the dicom files folder to open it.
	c.	Double-click the Header Files folder to open it.
	d.	Double-click the dicomDlg.h file to edit it.
	e.	Add the following lines to the file, just after the class constructor:

ILEADDicomDS *m_pLEADDicomDS;

9.	Go to the OnInitDialog() function as follows:
	a.	In the Project Workspace, click the ClassView tab.
	b.	Double-click the Dicom classes folder to open it.
	c.	Expand the CDicomDlg class.
	d.	Double-click the OnInitDialog() function to edit it.
10.	Edit the OnInitDialog() function to add the following code after the line that says //TODO: Add extra initialization here:

   BSTR lpLic = SysAllocString(_szLicString);
   ILEADDicomFactory *pFactory=NULL;
   CoCreateInstance(CLSID_LEADDicomFactory, NULL, CLSCTX_ALL,
                    IID_ILEADDicomFactory, (void**)&pFactory);
#if _MSC_VER < 1200
   m_pLEADDicomDS = (ILEADDicomDS*)pFactory->CreateObject ("LEADDicomDS.LEADDicomDS", lpLic);
#else
   ILEADDicomDSPtr spLEADDicomDS=NULL;
   spLEADDicomDS = pFactory->CreateObject ("LEADDicomDS.LEADDicomDS", lpLic);
   m_pLEADDicomDS = spLEADDicomDS;
   m_pLEADDicomDS->AddRef();//because when spLEADDicomDS goes out of scope, it will auto Release()!
#endif
   m_pLEADDicomDS->EnableMethodErrors = FALSE;

   // Unlock DICOM support.
   ILEADDicomKernel *pLEADDicomKernel = NULL;
#if _MSC_VER < 1200
   pLEADDicomKernel = (ILEADDicomKernel*)pFactory->CreateObject ("LEADDicomKernel.LEADDicomKernel", lpLic);
#else
   ILEADDicomKernelPtr spLEADDicomKernel=NULL;
   spLEADDicomKernel = pFactory->CreateObject ("LEADDicomKernel.LEADDicomKernel", lpLic);
   pLEADDicomKernel = spLEADDicomKernel;
   pLEADDicomKernel->AddRef();//because when spLEADDicomKernel goes out of scope, it will auto Release()!
#endif
   UNLOCKSUPPORT(*pLEADDicomKernel);
   pLEADDicomKernel->Release();

   pFactory->Release();
   SysFreeString(lpLic);

11.	Add the following lines to the top of the file, after all the #include statements:

const WCHAR BASED_CODE _szLicString[] =
L"LEADTOOLS OCX Copyright (c) 1991-2005 LEAD Technologies, Inc.";

12.	Add a command button to your form and name it as follows:
	a.	In the Project Workspace, click the ResourceView tab.
	b.	Double-click the Dicom resources folder to open it.
	c.	Double-click the Dialog folder to open it.
	d.	Double-click IDD_DICOM_DIALOG to design the dialog box.
	e.	Select the TODO... text control; then press the Delete key to delete it.
	f.	Add a command button to the dialog, and name it as follows:
	ID	Caption
	IDC_LOADDICOM	Load

13.	Press Ctrl-W to go to the MFC Class Wizard; then do the following:
	a.	Click the Message Maps tab.
	b.	In the Class Name combo box, select CDicomDlg.
	c.	In the Object IDs list box, select IDC_LOADDICOM.
	d.	In the Messages list box, select BN_CLICKED.
	e.	Click the Add function button. Choose OK for the default function name (OnLoaddicom).
	f.	Click the Edit Code button and enter the following code:

   int Result;
   short nRet;
   long lCount;
   CString cs;

   IDicomDSModulePtr pCurrentModule=NULL;

   IDicomDSElementPtr pCurrentElement=NULL;

   m_pLEADDicomDS->EnableMethodErrors = FALSE;
   nRet = m_pLEADDicomDS->LoadDS("D:\\LTWIN13\\images\\test2.dic", 0);
   if (nRet != DICOM_SUCCESS)
      AfxMessageBox("Error loading file");
   else
   {
      AfxMessageBox("File is loaded.");
      lCount = m_pLEADDicomDS->GetModuleCount();

      m_pLEADDicomDS->FindIndexModule(0);
      pCurrentModule = m_pLEADDicomDS->GetCurrentModule();
      pCurrentElement = pCurrentModule->GetElement(0);
      Result = m_pLEADDicomDS->SetCurrentElement (pCurrentElement->GethElement());
      if(Result)
      {
          cs.Format("There are %d modules in this data set\n"
                    "The first module has %d elements.\n"
                    "The first element has:\n"
                    "Tag number: %08X\n"
                    "VR: %08X\n", lCount,
                    pCurrentModule->GetElementCount(),
                    pCurrentElement->GetTag(),
                    pCurrentElement->GetVR());
          AfxMessageBox(cs);
      }
   }
   m_pLEADDicomDS->EnableMethodErrors = TRUE;

14.	On the main menu, select Build > Build dicom.exe to build the project.
15.	On the main menu, select Build > Execute dicom.exe to run the project.
16.	Press Ctrl-W to go to the MFC Class Wizard; then do the following:
	a.	Click the Message Maps tab.
	b.	In the Class Name combo box, select CDicomDlg.
	c.	In the Object IDs list box, select CDicomDlg.
	d.	In the Messages list box, select WM_CLOSED.
	e.	Click the Add function button. Choose OK for the default function name (OnClose).
	f.	Click the Edit Code button and enter the following code:

if(m_pLEADDicomDS)
m_pLEADDicomDS->Release();