线程通信-PostThreadMessage

 #include <stdio.h>
 #include <windows.h>
 #include <iostream.h>
 #include <process.h>
 #define UM_MSG1 WM_USER+1
 #define UM_MSG2 WM_USER+2
 DWORD WINAPI Thread1(LPVOID para)
 {

     DWORD dwThreadId = *(DWORD *)para;
     DWORD i=0;
     TCHAR *p;
     char strTmp[100];

     while(TRUE)
     {
         Sleep(1700);
         p=new TCHAR[10];
         sprintf(strTmp,"Hello %d %x",i++,p);
         PostThreadMessage(dwThreadId,UM_MSG1,(WPARAM)strTmp,(LPARAM)p);
         //delete []p;
     }

     return 0;

 }
 DWORD WINAPI Thread2(LPVOID para)
 {

     char strTmp[100];
     DWORD dwThreadId = *(DWORD *)para;
     DWORD i=0;
     TCHAR *p;
     while(TRUE)
     {

         Sleep(3000);
         p=new TCHAR[10];
         sprintf(strTmp,"World %d %x",i++,p);
         PostThreadMessage(dwThreadId,UM_MSG2,(WPARAM)strTmp,(LPARAM)p);
         //delete []p;
     }

     return 0;

 }
 int main()
 {

     DWORD dwValue =GetCurrentThreadId();
     cout<<"GetCurrentThreadId "<<dwValue<<endl;;
     HANDLE hThread1 = CreateThread(NULL,0,&Thread1,&dwValue,0,NULL);
     HANDLE hThread2 = CreateThread(NULL,0,&Thread2,&dwValue,0,NULL);
     CloseHandle(hThread1);
     CloseHandle(hThread2);
     MSG msg;
     while(GetMessage(&msg,NULL,0,0))
     {
         switch(msg.message)
         {
         case UM_MSG1:
         case UM_MSG2:
             printf("msg:0x%x /t%x /t%s0/n",msg.message,msg.lParam,msg.wParam);
             //注释掉这句你就会看到堆内存地址变化
             delete [](TCHAR *)msg.lParam;
             break;
         default:
             printf("Unknown msg:0x%x/n",msg.message);
             break;
         }
         Sleep(1);
     }
     return 0;
 }

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