定制main之前或之后的执行代码

/**//* prepostdemo.c */
#include <windows.h>

int WINAPI WinMain(
   HINSTANCE hInstance,
   HINSTANCE hPrevInstance,
   PSTR szCmdLine,
   int iCmdShow)
{
   MessageBox(NULL, TEXT("Hello, Main Program!"), TEXT("Hello"), 0);

   return 0;
}

int PreMain1(void)
{
   MessageBox(NULL, TEXT("First Pre-Main Function"),
                    TEXT("PreMain1"), 0);
   return 0;
}

int PreMain2(void)
{
   MessageBox(NULL, TEXT("Second Pre-Main Function"),
                    TEXT("PreMain2"), 0);
   return 0;
}

int PostMain1(void)
{
   MessageBox(NULL, TEXT("First Post-Main Function"),
                    TEXT("PostMain1"), 0);
   return 0;
}

int PostMain2(void)
{
   MessageBox(NULL, TEXT("Second Post-Main function"),
                    TEXT("PostMain2"), 0);
   return 0;
}

typedef int cb(void);

#pragma data_seg(".CRT$XIU")
static cb *autostart[] = { PreMain1, PreMain2 };

#pragma data_seg(".CRT$XPU")
static cb *autoexit[] = { PostMain1, PostMain2 };

#pragma data_seg()    /**//* reset data-segment */

http://www.codeguru.com/Cpp/misc/misc/threadsprocesses/article.php/c6945__1/