Teledyne LeCroy Automation API for Teledyne LeCroy PETracer_PETrainer - Manual (Page 52)

Teledyne LeCroy Automation API for PETracer/PETrainer
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4.2 IPETrace interface
The IPETrace interface is a primary dual interface for the PETrace object.
This interface is derived from the ITrace interface.
The IPETrace
interface implements all methods from the ITrace interface plus the following:
GetBusPacket
4.2.1 IPETrace::GetBusPacket
HRESULT GetBusPacket (
[in] long packet_number,
[out, retval] IDispatch** packet )
Retrieves the interface for a packet within a trace.
Parameters
packet_number Zero based number of packet to retrieve
packet Address of a pointer to the PEPacket object interface
Return values
Remarks
PEPacket object is created via this method call if the call was successful.
Example
WSH:
C++:
IPETrace* pe_trace;
. . .
IDispatch* packet;
try
{
packet = pe_trace->GetBusPacket( GetDlgItemInt(IDC_PACKET_NUMBER) ).Detach();
}
catch ( _com_error& er)
{
if (er.Description().length() > 0)
::MessageBox( NULL, er.Description(), _T("PETracer client"), MB_OK );
else
::MessageBox( NULL, er.ErrorMessage(),_T("PETracer client"), MB_OK );
return 1;
}
IPEPacket* custom_packet;
HRESULT hr = packet->QueryInterface( IID_IPEPacket, (void**)&custom_packet );
packet->Release();