Problem in Serial Communication

[spooky7]

Hi,Iam new to programming in Visual C++.I am trying tobuild a programm which sends string to serial port.I have managed to open and configure the serial port.A friend of mine wrote a code for me which send integers to serial port.Below is this code.

int CMC35ProjectDlg::Send(BYTE data)
{
///////////
//Begin
//////////

//Send Data to serial Port

DWORD dwBytes=0;
BYTE d=data;
int ret=d;
BYTE* sbuf=&d;
BOOL stest=WriteFile(hcom,sbuf,1,&dwBytes,NULL);

if ((stest&&dwBytes)==FALSE)
{
MessageBox("Connection between your PC and MC35 device connot be establish.\nPlease try again later.\nCheck the serail cabel.\n).",
"Error!",MB_OK | MB_ICONSTOP);
ret=-1;

}
return ret;

//////
//End
//////

}

Do you have any idea how to wrtie a function which sends strings to serial port?

Please help.

Thank you in advance

X - The truth is out there.

 

[Jeffray]

Send(char *szBuf)
{
...
WriteFile(hcom, szBuf,strlen(szBuf),,&dwBytes,NULL);
...
}

 

[spooky7]

Jeffray ,
Thank you for your help.I managed to write a function which sends string to serial.The code I wrote is below.


int CMC35ProjectDlg::Send(CString szBuf)

{
///////////
//Begin
//////////

//Send Data to serial Port

DWORD dwBytes=0;
// BYTE d=data;
// int ret=d;
int ret;
// BYTE* sbuf=&d;
BOOL stest=WriteFile(hcom,szBuf,strlen(szBuf),&dwBytes,NULL);

if ((stest&&dwBytes)==FALSE)
{
MessageBox("Connection between your PC and MC35 device connot be establish.\nPlease try again later.\nCheck the serail cabel.\n(ËÜèïò êáôÜ ôçí åêôÝëåóç ôçò óõíÜñôçóçò send).",
"Error!",MB_OK | MB_ICONSTOP);
ret=-1;

}
return ret;

//////
//End
//////
}

Thank you !!!!