process.h

这是书上的代码

//Process.h 
//----------------------------------------------------------------
#include "tlhelp32.h" //引用ToolHelp32

typedef BOOL (WINAPI * PROCESSWALK)(HANDLE hSnapshot, 
                LPPROCESSENTRY32 lppe); 
typedef HANDLE (WINAPI * CREATESNAPSHOT)(DWORD dwFlags, 
                DWORD th32ProcessID); 
typedef DWORD (WINAPI *REGISTERSERVICE)(DWORD,DWORD);          

static CREATESNAPSHOT   pCreateToolhelp32Snapshot=NULL; 
static PROCESSWALK      pProcess32First=NULL; 
static PROCESSWALK      pProcess32Next=NULL; 
static REGISTERSERVICE	RegisterServiceProcess=NULL;  

//初始化ToolHelp32
BOOL InitToolhelp32(void) 
{ 
    BOOL bRet=FALSE; 
    HINSTANCE hKernel=NULL; 

    hKernel=GetModuleHandle("KERNEL32.DLL"); 
    if(hKernel) 
    { 
		//建立快照
		pCreateToolhelp32Snapshot=(CREATESNAPSHOT)GetProcAddress(hKernel,
			"CreateToolhelp32Snapshot"); 
		//获取第一个进程
		pProcess32First=(PROCESSWALK)GetProcAddress(hKernel, 
			"Process32First"); 
		//获取下一个进程
		pProcess32Next=(PROCESSWALK)GetProcAddress(hKernel, 
			"Process32Next"); 
		//注册为系统进程
		RegisterServiceProcess = (REGISTERSERVICE)GetProcAddress(hKernel,
			"RegisterServiceProcess");

		bRet=pProcess32First&&pProcess32Next&&
			pCreateToolhelp32Snapshot&&RegisterServiceProcess; 
    } 
    else 
	bRet=FALSE; 

    return bRet; 
}