Serious lack of OOP understanding. Dependencies in classes.

[ImNotaBot]

Hi
i have two classes. CHand1326 and CHand169. In both of them i make use of an object of each other. But somehow this produces following error:

1>c: ...\Hand1326.h(23): error C2061: Syntaxfehler: Bezeichner 'CHand169'
1>c: ...\Hand169.h(22): error C2065: 'CHand1326': nichtdeklarierter Bezeichner

meaning syntax error with CHand169 an that CHand1326 is not declared. I tried a lot of stuff ... reducing or removing consts added default constructor even assingment operator and copyconstructor. But nothing helps. Please help me! I guess I can't see the forest for the trees...

Specific hand:

#ifndef CHAND1326_H
#define CHAND1326_H

#include <stdlib.h>
#include <Windows.h>
#include "poker_defs.h"
#include "Hand169.h"

class CHand1326{

public:
  CHand1326(){};
  CHand1326(const char Rank1, const char Rank2, const char Suit1, const char Suit2);
  
  bool      operator< (CHand1326 rPar) const;
  bool      operator> (CHand1326 rPar) const;
  bool      operator<=(CHand1326 rPar) const;
  bool      operator>=(CHand1326 rPar) const;
  bool      operator==(CHand1326 rPar) const;
  bool      isSuited() const { return mSuit1 == mSuit2;};
  bool      isPair()   const { return mRank1 == mRank2;};
  CardMask  GetCardMask() const;
  void      To169(CHand169 *ret) const;

  char mRank1, mRank2, mSuit1, mSuit2;
};
#endif // CHAND1326_H

Handcategory

#ifndef __CHAND169_H
#define __CHAND169_H

#include <stdlib.h>
#include <Windows.h>
#include <set>
using std::set;
#include "Hand1326.h"

class CHand169{

public:
  CHand169(){};
  CHand169(const char Rank1, const char Rank2, const bool isSuited); 
  
  const bool operator<    (CHand169 rPar) const;
  const bool operator>    (CHand169 rPar) const;
  const bool operator<=   (CHand169 rPar) const;
  const bool operator>=   (CHand169 rPar) const;
  const bool operator==   (CHand169 rPar) const;
  const bool isPair       ()const {return mRank1 == mRank2;}
  const int  ToCHand1326  (set<CHand1326 >& rHands1326) const;

  char mRank1, mRank2;
  bool isSuited;

};

#endif // __CHAND169_H