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allocating d3dxmeshcontainer

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Hi there, recently I started to learn about skinning, its quite a lot to learn, so while I'm learning it I wanted to try to do some of the things myself. Basicly I want to do the recursion bit for a D3DXMESHCONTAINER_DERIVED (as derived from D3DXMESHCONTAINER). Can any one help with how to do the memory allocation?
D3DXMESHCONTAINER_DERIVED  mesh_derived; //make an original one
D3DXMESHCONTAINER_DERIVED  *meshhierachy; //define a pointer

meshhierachy = &mesh_derived; //make pointer point to original

int t = 0;
while(t <5)
//what here?
meshhierachy = new D3DXMESHCONTAINER_DERIVED; //make a new one.
meshhierachy =  //do whatever is neede with it.

meshhierachy += sizeof(D3DXMESHCONTAINER_DERIVED); //move the pointer up, then
//make a new one?

outfile <<meshhierachy <<endl; //print out memory location for checking.

I think the second method works, but when I try to access them again using n* =+ sizeosizeof(), or n* -= sizeosizeof(), the pointer doesn't point to the same memory locations? At the moment I'm not trying to allocate everything in the containers, just the containers themselves. Alternatavely has anyone got amy other help/suggestions. Thanks alot

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