public static extern void IritE2TFreeTree(IritE2TExprNodeStruct *Root);
public static extern int IritE2TParamInTree(IritE2TExprNodeStruct *Root, byte *ParamName);
public static extern double IritE2TEvalTree(IritE2TExprNodeStruct *Root);
public static extern void IritE2TPrintTree(IritE2TExprNodeStruct *Root, byte *Str);
public static extern IritE2TExprNodeStruct *IritE2TDerivTree(IritE2TExprNodeStruct *Root, int Param);
public static extern IritE2TExprNodeStruct *IritE2TCopyTree(IritE2TExprNodeStruct *Root);
public static extern int IritE2TCmpTree(IritE2TExprNodeStruct *Root1, IritE2TExprNodeStruct *Root2);