RECEIVECCANCELREQUESTCALLBACK

Summary

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

Syntax

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

Parameters

HDICOMNET hNet

A DICOM Network handle.

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_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.

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); 
}