public static extern IGDrawUpdateFuncType IGSetCtlMeshPostFunc(IGDrawUpdateFuncType Func);
public static extern IGDrawUpdateFuncType IGSetSrfWirePostFunc(IGDrawUpdateFuncType Func);
public static extern IGDrawUpdateFuncType IGSetSketchPostFunc(IGDrawUpdateFuncType Func);
public static extern IGDrawUpdateFuncType IGSetSrfPolysPreFunc(IGDrawUpdateFuncType Func);