int _availMarkResult[NB_MAX_PLUGINMARKERS];

//  Requires communication with NppPlugin_SciMarkerSymbol.dll!
//  Iterate through markers looking for available ones until the number of markers needed or
//  NB_MAX_PLUGINMARKERS is reached.
//  Returns array with values: -1 = hasn't been checked, 0 = not avail, 1 = avail
int * getAvailableMarkers( int nb_markers_needed )
{
	namespace msg = npp_plugin::messages;

	_availMarkResult[NB_MAX_PLUGINMARKERS];
	for (int i = 0; i< NB_MAX_PLUGINMARKERS; i++) _availMarkResult[i] = -1;

	if ( nb_markers_needed > NB_MAX_PLUGINMARKERS ) return _availMarkResult;

	CommunicationInfo comm;
	comm.internalMsg = msg::NPPP_MSG_MARKERSYMBOL;
	comm.srcModuleName = getModuleName()->c_str();
	msg::info_MARKERSYMBOL _info(NULL, NULL);

	int mvSymbol;
	int svSymbol;
	int foundMarks = 0;
	for ( int currMark = 0; currMark < NB_MAX_PLUGINMARKERS; currMark++ ) {
		_info.markerNumber = currMark;

		_info.targetView = MAIN_VIEW;
		comm.info = &_info;
		bool mvMsg = ::SendMessage( hNpp(), NPPM_MSGTOPLUGIN, 
				(WPARAM)TEXT("NppPlugin_SciMarkerSymbol.dll"), (LPARAM)&comm );
		if ( mvMsg ) mvSymbol = _info.markerSymbol;

		_info.targetView = SUB_VIEW;
		comm.info = &_info;
		bool svMsg = ::SendMessage( hNpp(), NPPM_MSGTOPLUGIN, 
				(WPARAM)TEXT("NppPlugin_SciMarkerSymbol.dll"), (LPARAM)&comm );
		if ( svMsg ) svSymbol = _info.markerSymbol;

		if ( mvMsg && svMsg ) {
			if ( ( mvSymbol == SC_MARK_AVAILABLE ) && ( svSymbol == SC_MARK_AVAILABLE ) ) {
				_availMarkResult[currMark] = 1;
				foundMarks++;
			}
			else {
				_availMarkResult[currMark] = 0;
			}
		}

		if ( foundMarks == nb_markers_needed ) break;
	}

	return ( _availMarkResult );
}

//  Sends message to SciMarkerSymbols.dll to undefine a Scintilla marker for both Npp views and
//  remove any existing markers from margins.
void setMarkerAvailable( int markerNumber )
{
	namespace msg = npp_plugin::messages;

	CommunicationInfo comm;
	comm.internalMsg = msg::NPPP_MSG_MARKERUNDEFINE;
	comm.srcModuleName = getModuleName()->c_str();
	msg::info_MARKERSYMBOL _info( markerNumber , NULL );

	for ( int currView = MAIN_VIEW; currView <= SUB_VIEW; currView++ ) {
		_info.targetView = currView;
		comm.info = &_info;
		::SendMessage( hNpp(), NPPM_MSGTOPLUGIN, 
				(WPARAM)TEXT("NppPlugin_SciMarkerSymbol.dll"), (LPARAM)&comm );
	}
}