Very new to BMax: I need help here with DLL's

BlitzMax Forums/BlitzMax Programming/Very new to BMax: I need help here with DLL's

Extern "Win32"
	Function RtlMoveMemory(Destination:Byte Ptr,Source:Byte Ptr,Length)
EndExtern


so i only put in this piece of code, and i can use RtlMoveMemory as default?

and how do i access the BackBuffer ?