VC++之线程和进程之用邮槽实现进程间通信

一、创建应用工程

1、创建单文档应用程序工程

2、添加新单文档应用程序工程

二、编辑菜单项

1、编辑Thread工程之菜单项

2、编辑Child工程之菜单项四、添加代码

1、为CThreadView类添加消息响应函数代码voidCThreadView::OnReceive()

{

//TODO:Addyourcommandhandlercodehere

HANDLEmailslot;

mailslot=CreateMailslot("\\\\.\\mailslot\\mymailslot",0,MAILSLOT_WAIT_FOREVER,NULL);

//创建邮槽

if(INVALID_HANDLE_VALUE==mailslot)

{

MessageBox("Createfail");

CloseHandle(mailslot);

return;

}

charbuf[100];

DWORDdwread;

ReadFile(mailslot,buf,100,&dwread,NULL);

//读文件

MessageBox(buf);

CloseHandle(mailslot);

}

2、为CChildView类添加消息响应函数代码voidCChildView::OnSend()

{

//TODO:Addyourcommandhandlercodehere

HANDLEmailslot;

mailslot=CreateFile("\\\\.\\mailslot\\mymailslot",GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

if(INVALID_HANDLE_VALUE==mailslot)

{

MessageBox("Openfail");

CloseHandle(mailslot);

return;

}

charbuf[]="你好,长江!";

DWORDdwwrite;

WriteFile(mailslot,buf,strlen(buf)+1,&dwwrite,NULL);

CloseHandle(mailslot);

}五、编译六、运行七、函数说明

1、CreateMailslot()函数声明HANDLECreateMailslot(LPCTSTRlpName,DWORDnMaxMessageSize,DWORDlReadTimeOut,LPSECURITY_ATTRIBUTESlpSecurityAttributes)

功能：创建一个邮槽。函数调用成功，返回邮槽句柄；否则，返回INVALID_HANDLE_VALUE。

2、CreateFile()函数声明HANDLE

CreateFile(LPCTSTRlpFileName,DWORDdwDwsiredAccess,DWORDdwShareMode,LPSECURITY_ATTRIBUTESlpSecurityAttributes,DWORDdwCreationDispostion,DWORDdwFlagsAndAttributes,HANDLEhTemplateFile

)

功能：创建或打开一个文件、通信资源、磁盘驱动器等。

3、ReadFile()函数声明BOOL

ReadFile(HANDLEhFile,LPVOIDlpBuffer,DWORDnNumberOfBytesRead,LPDWORDlpNumberOfBytesRead,LPOVERLAPPEDlpOverlapped)

功能：从一个文件中文件指针位置开始读取数据。成功，返回非零值；失败，返回零。

4、WriteFile()函数声明BOOL

WriteFile(HANDLEhFile,LPVOIDlpBuffer,DWORDnNumberOfBytesToWrite,LPDWORD