Directx11 where initialize constant shader buffer -

i not know initialize shader constant buffer: before map(), before unmnap() or not difference initialize ?

see second parameter of create buffer function.

id3d11device::createbuffer(   [in]             const d3d11_buffer_desc *pdesc,   [in, optional]   const d3d11_subresource_data *pinitialdata,   [out, optional]  id3d11buffer **ppbuffer ); 

http://msdn.microsoft.com/en-us/library/windows/desktop/ff476501(v=vs.85).aspx