C / C++ / MFC

struct SLEDFrame
{
	char *idtfr,*Data1,*Data2;
};

SLEDFrame btnLED[] = {
						
"0x53", "0x30", "0x30", 		//0			
"0x53", "0x30", "0x31",  		//1	
"0x53", "0x30", "0x32",  		//2	
"0x53", "0x30", "0x33",  		//3	
"0x53", "0x30", "0x34",  		//4
};

void CMSCOMMDlg::setLED(int pLEDNo, BOOL pState)
{

	BYTE bID, bByte1, bByte2, bState, bCheckSumByte1, bCheckSumByte2;

	if (pState)
		bState = 0x31;   //ON
	else 
		bState = 0x30;   //OFF
	

CString tempStr, C1, C2;

tempStr = btnLED[pLEDNo-1].idtfr;
tempStr = tempStr.Mid(2);    
sscanf(tempStr, "%x", &bID);

tempStr = btnLED[pLEDNo-1].Data1;
tempStr = tempStr.Mid(2);    
sscanf(tempStr, "%x", &bByte1);

tempStr = btnLED[pLEDNo-1].Data2;
tempStr = tempStr.Mid(2);    
sscanf(tempStr, "%x", &bByte2);

BYTE bSum = bByte1 + bByte2 + bState; 	
tempStr.Format("%x",bSum);

C1 = "0x3" + tempStr.Left(1);
C2 = "0x3" + tempStr.Right(1);
sscanf(C1, "%x", &bCheckSumByte1);
sscanf(C2, "%x", &bCheckSumByte2);


	//To send data use this code:
	CByteArray btArray;
 
	btArray.Add (bID); 	  		//Identifier byte
	btArray.Add (bByte1); 		// DataByte 1
	btArray.Add (bByte2); 		// DataByte 2
	btArray.Add (bState); 		//Status Byte
	btArray.Add (bCheckSumByte1); 	//CheckSumByte1
	btArray.Add (bCheckSumByte2); 	//CheckSumByte2
	
	COleVariant var(btArray);
	m_Comm.SetOutput(var);	// Send the data. 

	
} //It shows the error when the cursor comes out of this function.

void Release() throw()
{
ATLASSERT( nRefs != 0 );
if( _AtlInterlockedDecrement( &nRefs ) <= 0 )
{
pStringMgr->Free( this );
}
}