| LEADTOOLS DICOM C++ Class Library Help > Classes and Member Functions > LDicomNet > LDicomNet Class Members > LDicomNet::OnReceiveCEchoRequest | 
#include "ltdic.h"
virtual L_VOID LDicomNet::OnReceiveCEchoRequest(nPresentationID, nMessageID, pszClass)
| L_UCHAR nPresentationID; | /* presentation ID */ | 
| L_UINT16 nMessageID; | /* message ID */ | 
| L_TCHAR * pszClass; | /* class type */ | 
Notifies a connection that a C-ECHO-REQ command was received. This function is available in the PACS Imaging Toolkit.
| Parameter | Description | 
| nPresentationID | Presentation ID. The presentation ID provides information about both the class type of the data and the transfer syntax to use when transferring the data. | 
| nMessageID | Message ID. Each message sent by a member of a connection should have a unique ID. Since a member of a connection may send several messages, this ID allows that member to identify when a specific request has been completed. | 
| pszClass | Class affected by the request. This will be an SOP Class or an SOP MetaClass. | 
Returns
None.
Comments
A call to this function is generated on a peer member of a connection when LDicomNet::SendCEchoRequest is called.
To customize this function, you must derive a class from LDicomNet and override this function.
Required DLLs and Libraries
| LTDIC For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application | 
Win32, x64
See Also
| Functions: | LDicomNet::SendCEchoRequest, LDicomNet::SendCEchoResponse, LDicomNet::OnReceiveCEchoResponse | 
| Topics: | 
Example
//In this example:
//
//1. LMyDicomNet is a class derived from LDicomNet
//2. LMyDicomNet has the following member variables:
// m_nClientOrServer: can be (STATUS_NONE, STATUS_SERVER, STATUS_CLIENT)
// identifieds the LMyDicomNet object as a server or a client
// m_nDataCommand: can be (COMMAND_C_MOVE,COMMAND_C_GET)
// set so the server knows how a C-Store Response was generated
//
//3. m_pDicomNet points to a valid LMyDicomNet object
// LMyDicomNet *m_pDicomNet
//
//4. A connection exists between client and server
//5. An association exists between the client and server
L_VOID LMyDicomNet::OnReceiveCEchoRequest(L_UCHAR nPresentationID, L_UINT16 nMessageID, L_TCHAR *pszClass)
{
   CString strMsg;
   L_UINT lPeerPort;
   L_TCHAR  szPeerAddress[100];
   
   GetPeerInfo(szPeerAddress, 100, &lPeerPort);
   strMsg.Format(TEXT("*** OnReceiveCEchoRequest ***\nPeer[%s]\nnPresentationID[%d]\nnMessageID[%d]\npszClass[%s]"), 
                 szPeerAddress,
                  nPresentationID, 
                  nMessageID, 
                  pszClass);
   L_UINT16  uStatus = COMMAND_STATUS_SUCCESS;
   SendCEchoResponse(nPresentationID, nMessageID, pszClass, uStatus);
   strMsg += "SendCEchoResponse\n";
   AfxMessageBox(strMsg);
}