extern "C" __declspec(dllimport) int __stdcall Solve(int guessOnly,
  int guessExcluded, int diagonalVers, int diff, int v[9][9]);

extern "C" __declspec(dllimport) int __stdcall Generate(int partGrid[9][9],
  int diff, int diffMin, int diffMax, int diagonalVers, int symmetric);
  
extern "C" __declspec(dllimport) int __stdcall GetNodesSearched(void);

extern "C" __declspec(dllimport) int __stdcall GetFirstSolution(int column, int row); 

extern "C" __declspec(dllimport) int __stdcall GetFirstSolDepth(void);

extern "C" __declspec(dllimport) int __stdcall GetFirstSolNodes(void);

extern "C" __declspec(dllimport) int __stdcall GetCountGenerate(void);

extern "C" __declspec(dllimport) int __stdcall GetProcessingTime(void);

extern "C" __declspec(dllimport) int __stdcall HintX(struct penCellType
  pen[9][9], struct hintInfoType * hintp, int v[9][9], int diff, int diagonalVers);

struct penCellType {
  int penMarks[9];
  int length;
};

struct hintInfoType {
  int hintCol;
  int hintRow;
  char hintText1[128];
  char hintText2[128];
};

extern "C" __declspec(dllexport) int __stdcall SetLevels (int levels[NOTECHS);