环境： windows 验证的my.exe是32位程序

需要包含系统头文件

#include <windows.h>
#include <tlhelp32.h>

代码

	std::wstring wProcessName = QString("my.exe").toStdWString();
	HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
	if (hSnapshot == INVALID_HANDLE_VALUE) 
	{
	     return false;
	}
	PROCESSENTRY32 pe;
	pe.dwSize = sizeof(PROCESSENTRY32);
	if (Process32First(hSnapshot, &pe)) 
	{
	   do {
	   		 std::wstring wExeFile;
	         auto m_char = WcharToChar(pe.szExeFile);
	         CharToWchar(m_char, wExeFile);
	         if (wExeFile == wProcessName) 
	         {
	             CloseHandle(hSnapshot);
	             qDebug()<<"软件还在运行";
	             return true;
	         } 
	      } while (Process32Next(hSnapshot, &pe));
	}
	CloseHandle(hSnapshot);

WcharToChar

 char* StringTools::WcharToChar(const wchar_t* wp)
 {
	 char* m_char;
	 int len = WideCharToMultiByte(CP_ACP, 0, wp, wcslen(wp), NULL, 0, NULL, NULL);
	 m_char = new char[len + 1];
	 WideCharToMultiByte(CP_ACP, 0, wp, wcslen(wp), m_char, len, NULL, NULL);
	 m_char[len] = '\0';
	 return m_char;
 }

CharToWchar

 wchar_t* CharToWchar(const char* c)
 {
	 wchar_t* m_wchar;
	 int len = MultiByteToWideChar(CP_ACP, 0, c, strlen(c), NULL, 0);
	 m_wchar = new wchar_t[len + 1];
	 MultiByteToWideChar(CP_ACP, 0, c, strlen(c), m_wchar, len);
	 m_wchar[len] = '\0';
	 return m_wchar;
 }