#include<process.h>

 1 #define _CRT_SECURE_NO_WARNINGS
 2 
 3 #include<stdio.h>
 4 #include<stdlib.h>
 5 #include<windows.h>
 6 #include<process.h>//进程
 7 
 8 void run(void *p)
 9 {
10     MessageBoxA(0, "a", "z", 0);
11 }
12 
13 main()
14 {
15     int i;
16     
17     for (i = 0;i < 5;i++)
18     {
19         //run(NULL);
20         _beginthread(run, 0, NULL);
21     }
22 
23     system("pause");
24 }