| LEADTOOLS DICOM C DLL Help > Function References > L_DicomSendCCancelRequest | 
#include "ltdic.h"
L_LTDIC_API L_INT L_DicomSendCCancelRequest(hNet, nPresentationID, nMessageID)
| HDICOMNET hNet; | /* a DICOM Network handle */ | 
| L_UCHAR nPresentationID; | /* presentation ID */ | 
| L_UINT16 nMessageID; | /* message ID */ | 
Sends a C-CANCEL-REQ message to a peer member of a connection. This function is available in the PACS Imaging Toolkit.
| Parameter | Description | 
| hNet | A DICOM Network handle to the peer member of the connection. | 
| 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. | 
Returns
| DICOM_SUCCESS | The function was successful. | 
| >0 | An error occurred. Refer to Return Codes. | 
Comments
Calling this function generates a call to RECEIVECCANCELREQUESTCALLBACK on the SCP.
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, Linux.
See Also
| Functions: | |
| Topics: | 
Example
L_INT DicomSendCCancelRequestExample(
   HDICOMNET hNet,
   L_UCHAR gCancelPresentationID,
   L_UCHAR gCancelMessageID)
{
   /* send a Cancel Request Command to the server */
   /* 
      gCancelPresentationID is a global variable that should
                            be set before sending a command
                            that could be canceled
      gCancelMessageID      is a global variable that should
                            be set before sending a command
                            that could be canceled
   */
   return L_DicomSendCCancelRequest(hNet, gCancelPresentationID, gCancelMessageID);
}