windows系统调用 利用事件对象实现进程通信

 #include "iostream"
 #include "windows.h"
 #include "cstring"
 using namespace std;

 static LPCTSTR g_szContinueEvent="w2kdg.EventDemo.event.Continue";

 BOOL CreateChild(){
     TCHAR szFilename[MAX_PATH];
     GetModuleFileName(NULL,szFilename,MAX_PATH);

     TCHAR szCmdLine[MAX_PATH];
     sprintf_s(szCmdLine,"\"%s\" child",szFilename);

     STARTUPINFO si;
     ZeroMemory(reinterpret_cast<void*>(&si),sizeof(si));
     si.cb=sizeof(si);

     PROCESS_INFORMATION pi;

     BOOL bCreateOK=CreateProcess(
         szFilename,
         szCmdLine,
         NULL,
         NULL,
         FALSE,
         ,
         NULL,
         NULL,
         &si,
         &pi

         );

     if(bCreateOK){
         CloseHandle(pi.hProcess);
         CloseHandle(pi.hThread);
     }

     return (bCreateOK);

 }

 void WaitForChild(){
     HANDLE hEventContinue=CreateEvent(
         NULL,
         TRUE,
         FALSE,
         g_szContinueEvent
         );

     if(hEventContinue!=NULL){
         printf("Event creates.\n");
         if(CreateChild()){
             printf("Child process created.\n");
             printf("Parent process waiting on child process.\n");
             WaitForSingleObject(hEventContinue,INFINITE);
             printf("Parent process received the event signaling from child process.\n");
         }

         CloseHandle(hEventContinue);
     }

 }

 void SignalParent(){
     HANDLE hEventContinue=OpenEvent(
         EVENT_MODIFY_STATE,
         FALSE,
         g_szContinueEvent
         );

     if(hEventContinue!=NULL){
         SetEvent(hEventContinue);
         printf("Child process begining...\n");
     }

     CloseHandle(hEventContinue);
 }

 int main(int argc,char *argv[]){
     if(argc>&&strcmp(argv[],"child")==){
         SignalParent();
     }
     else{

     WaitForChild();
     printf("Parent process released.\n");
     }
     getchar();
     return ;

 }