IDirectDrawSurface3::Unlock

DDraw vtable[32] → HRESULT

IDirectDrawSurface3::Unlock is a method of the COM interface IDirectDrawSurface3 in DirectDraw. Its function pointer sits at vtable index 32 — the zero-based slot in that interface's virtual method table, counted from QueryInterface and including every entry inherited from a base interface. It takes 1 parameter (data) and returns HRESULT.

COM methods are reached through that table rather than by an exported name, so the slot index is what a wrapper, an interface hook or a disassembly listing has to resolve against. The parameter order and types below are the ones this interface declares.