public const string ifcenginedll = @"ifcengine.dll";

[DllImport(IFCEngineDLL, EntryPoint = "setGlobalPlacement")]
public static extern Int32 setGlobalPlacement(int_t model, ref double origin, byte includeRotation);    

Property model

Size: 32 bit / 4 byte (value)
The handle to the model. The model handle is static during its existance. Several models can be opened simultaniously within one session. Different models are always independent, threads are allowed to be running on different models simultaniously.

Property origin

Size: 32 bit / 4 byte (reference)

Property includeRotation

Size: 8 bit / 1 byte (value)