进程-取得当前可执行程序的进程号-对比前者通过名字取得的进程号

工程编译输出文件为Test.exe

#include "windows.h"
#include <string>
#include "tlhelp32.h"
#include <iostream>
#include <stdio.h>
#include <tchar.h>
#include <vector>

DWORD FindProcessIdByName(const std::string& in_processName)   
{   

	PROCESSENTRY32 processInfo;   
	processInfo.dwSize = sizeof(processInfo);   

	HANDLE processesSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);   
	if (processesSnapshot == INVALID_HANDLE_VALUE)   
	{   
		return 0;   
	}   

	//Process First in snapshot and traverse the list.   
	Process32First(processesSnapshot, &processInfo);   
	if (!in_processName.compare(processInfo.szExeFile))   
	{   
		//Process exists.   
		CloseHandle(processesSnapshot);   
		return processInfo.th32ProcessID;   
	}   

	while ( Process32Next(processesSnapshot, &processInfo) )   
	{   
		if ( !in_processName.compare(processInfo.szExeFile) )   
		{   
			CloseHandle(processesSnapshot);   
			return processInfo.th32ProcessID;   
		}   
	}   

	CloseHandle(processesSnapshot);   
	return 0;   
} 


int _tmain(int argc, _TCHAR* argv[])
{

	std::cout<<"Current Process ID:"<<GetCurrentProcessId()<<std::endl;
	std::cout<<"Test.exe Process ID:"<<FindProcessIdByName("Test.exe")<<std::endl;
	return 0;
}

结果：


Current Process ID:4148
Test.exe Process ID:4148