i code this "static const MTypeId id "in .h and "const MTypeId MeltNode::id( 0x00334 )" in .cpp
but i don't code that "#include <maya/MTypeId.h>".
when i build the project, it don't have errors . why?
also about "const MPlug& plug, MDataBlock& data" i don't code this"#include <maya/MPlug.h>
#include <maya/MDataBlock.h>" 0 error.