C++通过进程名获取进程句柄

记录下一段，比较常用的代码。

#include <TlHelp32.h>

//通过进程ID获取进程句柄
//PROCESS_ALL_ACCESS 获取所有权限
//PROCESS_QUERY_INFORMATION 获取进程的令牌、退出码和优先级等信息
HANDLE GetProcessHandle(int nID)
{
	return OpenProcess(PROCESS_ALL_ACCESS, FALSE, nID);
}

//通过进程名（带后缀.exe）获取进程句柄
HANDLE GetProcessHandle(LPCWSTR lpName)
{
	HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
	if (INVALID_HANDLE_VALUE == hSnapshot) 
	{
		return NULL;
	}
	PROCESSENTRY32 pe = { sizeof(pe) };
	BOOL fOk;
	for (fOk = Process32First(hSnapshot, &pe); fOk; fOk = Process32Next(hSnapshot, &pe)) 
	{
		if (!_tcsicmp(pe.szExeFile, lpName)) // 不区分大小写
		{
			CloseHandle(hSnapshot);
			return GetProcessHandle(pe.th32ProcessID);
		}
	}
	return NULL;
}