Point export in C++/CLI for GH

Good morning everybody
i want too use c++ in GH because a measurment sensor provides only a c++ sdk.

so i set up a c++ cli project as a small exampel.
i'm very new in using Rhino and GH, so now i have serveral questions:
the first thing is in c++ i have to implement more methods than in my c# test project.

they are:

int MyGhComponent::MasterParameterIndex::get()
{
return 0;
}
void MyGhComponent::MasterParameterIndex::set(int index)
{

}
bool MyGhComponent::IsValidMasterParameterIndex::get()
{
return 1;
}

i found no hint for the implementation of that interfaces. could someone tell me that is correct ?
OK, it works, but is it well writen ? What is the MasterParameterIndex?

the second "bigger" problem is, i want to have an output of an pointlist.
X y Z
1.2 1.3 1.1
2.1 5.2 9.2
...

my first approch was to use a

void MyGhComponent::RegisterOutputParams(GH_Component::GH_OutputParamManager^ pManager)
{
pManager->Register_PointParam("Coordinate", "XYZ", "Node-Coordinate");
}

and

void MyGhComponent::SolveInstance(IGH_DataAccess^ DA)
{
Collections::Generic::List<GH_IO::Types::GH_Point3D>^ pnt = gcnew Collections::Generic::List<GH_IO::Types::GH_Point3D>();
for (int i = 0; i < 10; i++)
{
GH_IO::Types::GH_Point3D^ point = gcnew GH_IO::Types::GH_Point3D(i, i, i);
pnt->Add(i);
}
DA->SetDataList(3, pnt);
}

but this exampel doesn't work...
i wirte a small workaround and use the following

pManager->Register_DoubleParam("X-Koordinate", "X", "X");
pManager->Register_DoubleParam("Y-Koordinate", "Y", "Y");
pManager->Register_DoubleParam("Z-Koordinate", "Z", "Z");

Collections::Generic::List<double>^ pntx= gcnew Collections::Generic::List<double>();
Collections::Generic::List<double>^ pnty= gcnew Collections::Generic::List<double>();
Collections::Generic::List<double>^ pntz= gcnew Collections::Generic::List<double>();

... add .. ect.

this workaround do the job, but i want a better soulution. and i know somewhere out there sould be a better solution.
i want to use 3D Points directly in GH without list conversation.

so somebody a familiar with c++ / cli ? and could give me some tipps or a soulution ?

the first thing is: what is the right RegisterOutputParams ?

and witch data type is the right ?
Point3d doesn't work. so i try GH_IO::Types::GH_Point3D and Rhino::Geometry::Point3d ...

br
Friedrich