serialportdll.h

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#ifndef __SERIALPORT_H__
#define __SERIALPORT_H__

#ifdef SERIALPORTDLL_EXPORTS
#define SERIALPORTDLL_API __declspec(dllexport)
#else
#define SERIALPORTDLL_API __declspec(dllimport)
#endif

#if defined (_DEBUG) 
  #pragma comment(lib,"SerialPortDll.lib") 
  #pragma message("Automatically linking with SerialPortDll.dll") 
#else 
  #pragma comment(lib,"SerialPortDll.lib") 
  #pragma message("Automatically linking with SerialPortDll.dll") 
#endif 

#define WM_COMM_DATA_CALLBACK WM_USER+1

typedef void (*LPDataCallBackProc)(char *data,int length,DWORD userdata);

class SERIALPORTDLL_API CSerialPortDll  
{
public:
	CSerialPortDll();
	
	virtual ~CSerialPortDll();

	BOOL OpenPort(LPCTSTR Port,int Baudrate,int DataBits,int StopBits,int Parity,LPDataCallBackProc callbackproc=NULL,DWORD userdata=0); 
	BOOL ClosePort(); 
	
	BOOL Activate();
	BOOL Deactivate();
	BOOL IsActive();
	
	static DWORD WINAPI ReadPortThread(LPVOID lpParameter);
	
	DWORD ReadPort(char *data,int length); 
	DWORD WritePort(char *data,int length); 
	
private:
	HANDLE m_hComm; 
	HANDLE m_hReadThread; 
	BOOL m_bReceiving; 
	int m_nBufferSize; 

	char *Buffer; 
	
	LPDataCallBackProc m_lpDataCallBackProc;
	DWORD m_dwUserData;

	DCB dcb;
	COMMTIMEOUTS CommTimeOuts;	
	
};

#endif __SERIALPORT_H__