void LockIndexBuffer( IndexBufferLockHandler handler )

Summary

Lock all the memory in this buffer so you can write to it

void LockIndexBuffer( int elementCount, IndexBufferLockHandler handler )

Summary

Lock a specific amount of the memory in this buffer so you can write to it

void LockIndexBuffer( int elementOffset, int elementCount, IndexBufferLockHandler handler )

Summary

Lock a region of memory in this buffer so you can write to it