Notifies a connection that an N-ACTION-RSP command was received. This function is available in the PACS Imaging.


#include "ltdic.h"

L_VOID pEXT_CALLBACK Your Function(hNet, nPresentationID, nMessageID, pszClass, pszInstance, nStatus, nAction, hDS, pUserData)



A DICOM Network handle to the peer member of the connection.

L_UCHAR 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.

L_UINT16 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.

L_TCHAR * pszClass

Class affected by the request. This will be an SOP Class or an SOP MetaClass.

L_TCHAR * pszInstance

The instance of the class. A server may, for example, have three instances of the Nuclear Medicine Class. This value identifies the data with a specific instance.

L_UINT16 nStatus

The status of the original request. For a list of possible values, refer to Status Constants.

L_UINT16 nAction

An application specific action to be performed on the specified data set.


The data set resulting from the specified action. This can be NULL.

L_VOID * pUserData

Void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function.

Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function.




A call to this function is generated on a peer member of a connection when L_DicomSendNActionResponse is called.

To use this callback function, RECEIVENACTIONRESPONSECALLBACK must be set using L_DicomSetCallback.

The action specified may be the addition of a new patient, the deletion of a patient, the addition of a new study, a print job, etc. The nAction value, which designates the action to perform is determined by the server. To find out the values used, you must contact the organization that created the server. When creating a server, the values and their corresponding meanings are determined by those creating the server.

Required DLLs and Libraries


Win32, x64

See Also




static HWND hList;      /* handle to list box */ 
L_VOID EXT_CALLBACK OnReceiveNActionResponse  (HDICOMNET hNet, L_UCHAR nPresentationID, L_UINT16 nMessageID, L_TCHAR *pszClass, L_TCHAR *pszInstance, L_UINT16 nStatus, L_UINT16 nAction, HDICOMDS hDS, L_VOID *pUserData) 
   L_TCHAR szMsg[800]; 
   ListBox_AddString(hList, TEXT("Command Set - N-ACTION-RESPONSE")); 
   wsprintf(szMsg, TEXT("     Presentation ID: %d"), nPresentationID); 
   ListBox_AddString(hList, szMsg); 
   wsprintf(szMsg, TEXT("     Message ID: %d"), nMessageID); 
   ListBox_AddString(hList, szMsg); 
   wsprintf(szMsg, TEXT("     Affected SOP Class: %s"), pszClass); 
   ListBox_AddString(hList, szMsg); 
   wsprintf(szMsg, TEXT("     Affected SOP Instance: %s"), pszInstance); 
   ListBox_AddString(hList, szMsg); 
   wsprintf(szMsg, TEXT("     Status: %d"), nStatus); 
   ListBox_AddString(hList, szMsg); 
   wsprintf(szMsg, TEXT("     Action: %d"), (int)nAction); 
   ListBox_AddString(hList, szMsg); 
Help Version 23.0.2024.2.29
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© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.


Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.