RECEIVECCANCELREQUESTCALLBACK

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#include "ltdic.h"

L_VOID pEXT_CALLBACK Your Function(hNet, nPresentationID, nMessageID, pUserData)

HDICOMNET hNet;	/* a DICOM Network handle */
L_UCHAR nPresentationID;	/* presentation ID */
L_UINT16 nMessageID;	/* message ID */
L_VOID * pUserData;	/* pointer to additional data */

Notifies a connection that a C-CANCEL-REQ command was received. This function is available in the PACS Imaging.

Parameter	Description
hNet	A DICOM Network handle.
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.
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.

Returns

None.

Comments

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

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

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

Platforms

Win32, x64

See Also

Functions:	L_DicomSendCCancelRequest
Topics:	Receiving Messages

Example

L_VOID EXT_CALLBACK OnReceiveCCancelRequest(HDICOMNET hNet, L_UCHAR nPresentationID, L_UINT16 nMessageID, L_VOID *pUserData)
{
   UNREFERENCED_PARAMETER(pUserData);
   UNREFERENCED_PARAMETER(hNet);
   L_TCHAR szMsg[800];
   /* note, this sample AE ignores C-CANCEL-REQUEST commands for simplicity */
   wsprintf(szMsg, TEXT("C-CANCEL-REQUEST was received - %d - %d"),nPresentationID, nMessageID);
   MessageBox(NULL, szMsg, TEXT("Cancel"), MB_OK);
}