#include "ltdic.h"

L_VOID pEXT_CALLBACK Your Function(hNet, nError, nType, pBuffer, nBytes, UserData)


a DICOM Network handle

L_INT nError;

error code

L_UCHAR nType;

type of message/data received

L_UCHAR * pBuffer;


L_UINT32 nBytes;

number of bytes in pBuffer

L_VOID * UserData;

pointer to additional data

Notifies a connection that data was received. This function is available in the PACS Imaging.

Parameter Description
hNet A DICOM Network handle.
nError Error code. Refer to Return Codes.
nType The type of data that was sent. Possible values are:
  Value Meaning
  PDU_UNKNOWN [0x00] Unknown data sent.
  PDU_ASSOCIATE_REQUEST [0x01] Associate Request message sent
  PDU_ASSOCIATE_ACCEPT [0x02] Associate Accept message sent
  PDU_ASSOCIATE_REJECT [0x03] Associate Reject message sent
  PDU_DATA_TRANSFER [0x04] Data transfer made.
  PDU_RELEASE_REQUEST [0x05] Release Request message sent
  PDU_RELEASE_RESPONSE [0x06] Release Response message sent
  PDU_ABORT [0x07] Abort message sent.
pBuffer Buffer that contains all the data that was sent. This includes the command set and any associated data set.
nBytes Number of bytes of data in pBuffer.
UserData 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.




This is a low level means of receiving DICOM messages and data. It allows you to process messages yourself, instead of using the high level message processing functions provided.

This callback function is generated for each L_DicomSendXXX or LDicomSendXXX function provided by LEADTOOLS.

Required DLLs and Libraries


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


Receiving Messages


For an example, refer to L_DicomListen.

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