BOOL DestroyWindow HWND hWnd);
/*说明：采用WIN32函数销毁控件*/
/*hWnd：EasyComm控件句柄*/
/*举例：可以选择在客户窗体销毁前销毁EasyComm控件*/
void CCustomerWnd::OnDestroy )
{
if ::IsWindow m_hCom))
::DestroyWindow m_hCom);
CWnd::OnDestroy );
}

4）、EasyComm控件消息：
COM_SETPORT：设置端口名称
wParam: 0
lParam: 端口号字符串指针
举例：SendMessage hCom,COM_SETPORT,0, LPARAM)_T “COM1”));

COM_GETPORT：取端口号
wParam: 缓冲区大小
lParam：缓冲区指针
举例：TCHAR buf[10];
SendMessage hCom,COM_GETPORT,9, LPARAM)buf);

COM_SETBAUDRATE：设置端口波特率
wParam：波特率长整数值
lParam：0
举例：SendMessage hCom,COM_SETBAUDRATE,4800,0);

COM_GETBAUDRATE：取端口波特率
wParam: 0
lParam: 0
举例：long nBuad =  long)SendMessage hCom,COM_GETBAUDRATE,0,0);

COM_SETBYTESIZE：设置端口位长
wParam: 位长短整数值
lParam: 0
举例：SendMessage hCom,COM_SETBYTESIZE,8,0);

COM_GETBYTESIZE: 取端口位长
wParam: 0
lParam: 0
举例：short nByteSize =  short)SendMessage hCom,COM_GETBYTESIZE,0,0);

COM_SETSTOPBITS: 设置端口停止位
wParam: 停止位短整数值
lParam: 0
#define STOPBITS_ONE 1 /*1位停止位*/
#define STOPBITS_TWO 2 /*2位停止位*/
#define STOPBITS_ONEHALF 3/*1.5停止位*/
举例：SendMessage hCom,COM_SETSTOPBITS,1,0);

COM_GETSTOPBITS: 取端口停止位
wParam: 0
lParam: 0
举例：short nStopBits =  short)SendMessage hCom,COM_GETSTOPBITS,0,0);

COM_SETPARITY : 设置端口校验
wParam: 校验短整数值
lParam: 0
#define PY_NONE 0 /*无奇偶校验*/
#define PY_EVEN 1 /*偶校验*/
#define PY_ODD 2 /*奇校验*/
举例：SendMessage hCom,COM_SETPARITY,0,0);

COM_GETPARITY: 取端口校验
wParam: 0
lParam: 0
举例：short nParity =  short)SendMessage hCom,COM_GETPARITY,0,0);

COM_SETFCTRL: 设置端口流控制
wParam: 流模式短整数值
lParam: 0
#define FLOWCTRL_NONE 0 /*无流控制*/
#define FLOWCTRL_HARD 1 /*硬件控制*/
#define FLOWCTRL_SOFT 2 /*软件控制*/
举例：SendMessage hCom,COM_SETCTRL,0,0);

COM_GETFCTRL: 取端口流控制
wParam: 0
lParam: 0
举例：short nCtrl =  short)SendMessage hCom,COM_GETCTRL,0,0);

COM_SETTIMEOUTS: 设置读写每字节超时毫秒数
wParam: LOWORD为读超时，HIWORD为写超时
lParam: 0
举例：SendMessage hCom,COM_SETTIMEOUTS,MAKEWPARAM 1,1),0);

COM_GETTIMEOUTS: 取读写每字节超时毫秒数
wParam: 0
lparam: 0
举例：DWORD dw =  DWORD)SendMessage hCom,COM_GETTIMEOUTS,0,0);
short nReadPerByte = LOWORD dw); short nWritePerByte = HIWORD dw);

COM_SETACKCHAR: 设置端口回应字符
wParam: 回应字符
lParam: 0
举例：SendMessage hCom,COM_SETACKCHAR, WPARAM)0x06,0);

COM_GETACKCHAR: 取端口回应字符
wParam: 0
lParam: 0
举例: char chAck =  char)SendMessage hCom,COM_GETACKCHAR,0,0);

COM_SETLISTIMER: 设置端口侦听超时毫秒数
wParam: 短整数毫秒
lParam: 0
举例：SendMessage hCom,COM_SETLISTIMER,100,0);

COM_GETLISTIMER: 取端口侦听超时毫秒数
wParam: 0
lParam: 0
举例：short nListemTimer =  short)SendMessage hCom,COM_GETLISTIMER,0,0);

COM_SETQUEUE: 设置端口内部读写缓冲区大小
wParam: 读缓冲区长整数值
lParam: 写缓冲区长整数值
举例：SendMessage hCom,COM_SETQUEUE,1024,1024)

COM_SETACTIVE: 设置端口状态，打开或关闭
wParam: TRUE则打开端口，FALSE则关闭端口
lParam: 0
举例：SendMesage hCom,COM_SETACTIVE, WPARAM)TRUE,0);
SendMessage hCom,COM_SETACTIVE, WPARAM)FALSE,0);

COM_GETACTIVE: 取端口状态
wParam: 0
lParam: 0
举例：BOOL bActive = SendMessage hCom,COM_GETACTIVE,0,0);

COM_SETDATA: 向端口写数据
wParam: 长整数值的数据大小
lParam: 数据指针
返回：已写的字节数
举例：long nWrited = SendMessage hCom,COM_SETDATA, WPARAM)size, LPARAM)data);

COM_GETDATA: 从端口读数据
wParam: 长整数值的请求字节数
lParam: 缓冲区指针
返回：已读的字节数
举例：long nReaded = SendMessage hCom,COM_GETDATA, WPARAM)size, LPARAM)buf);

5）、EasyComm的通知消息：控件通过WM_NOTIFY通知父客户窗体，该消息体的结构为：
struct {
HWND hwndFrom; /*控件的窗体句柄*/
UINT idFrom; /*控件的ID*/
UINT code; /*消息标识*/
WPARAM wParam; /*根据消息标识设置*/
LPARAM lParam; /*根据消息标识设置*/
}NMHDR_COMM;
用于通知端口状态的结构：

struct { BOOL bRLSDHold; /*非零则端口等待RLSD信号，输出阻塞*/ BOOL bCTSHold; /*非零则端口等待CTS信号，输出阻塞*/ BOOL bDSRHold; /*非零则端口等待DSR信号，输出阻塞*/ BOOL bXOFFHold; /*非零则收到XOFF字符，输出阻塞*/ BOOL bXOFFSent; /*非零则送出XOFF字符，输出阻塞*/ int nInQueue; /*端口输入缓冲区字符数*/ int nOutQueue; /*端口输出缓冲区字符数*/ }CommMonitor;

具体消息标识（code）分述如下：
NC_COMMBREAK：端口中断通知
wParam: 忽略
lParam: 忽略

NC_COMMERROR：端口错误通知
wParam: 错误代码
lParam: 错误文本指针

NC_COMMMONITOR：端口状态通知
wParam: 忽略
lParam: 端口状态结构CommMonitor指针

NC_COMMACK：端口收到回应字符
wParam: 输入缓冲区可读的字符数
lParam: 忽略

NC_COMMRECIVE：端口收到字符
wParam: 输入缓冲区可读的字符数
lParam: 忽略
举例：在客户窗体中响应控件通知

BOOL CCustomerWnd::OnNotify WPARAM wParam, LPARAM lParam, LRESULT* pResult) { NMHDR* phdr =  NMHDR*)lParam; if phdr->idFrom == IDC_COM) { NMHDR_COMM* pnc =  NMHDR_COMM*)lParam; if pnc->code == NC_COMMBREAK) { AfxMessageBox _T "Comm Breaked")); }else if pnc->code == NC_COMMERROR) { AfxMessageBox  TCHAR*)pnc->lParam); }else if pnc->code == NC_COMMMONITOR) { CommMonitor* pcm =  CommMonitor*)pnc->lParam; … }else if pnc->code == NC_COMMRECIVE) { if pnc->wParam) { TCHAR *tmp =  TCHAR*)calloc  long)pnc->wParam + 1,sizeof TCHAR)); ::SendMessage hCom,COM_GETDATA, WPARAM)pnc->wParam, LPARAM)tmp); … free tmp); } } } return CWnd::OnNotify wParam, lParam, pResult); }