注：pe.szExeFile有时候是全路经文件名，有时候只是文件名，原因有待考究，或者请哪位高手指教

DWORD GetProcessIdFromName(LPCTSTR name)
{
 PROCESSENTRY32 pe;
 DWORD id = 0;

 HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
 pe.dwSize = sizeof(PROCESSENTRY32);
 if( !Process32First(hSnapshot,&pe) )
  return 0;

 do
 {
  pe.dwSize = sizeof(PROCESSENTRY32);
  if( Process32Next(hSnapshot,&pe)==FALSE )
   break;
  if(strcmp(pe.szExeFile,name) == 0)
  {
   id = pe.th32ProcessID;
   break;
  }

 } while(1);

 CloseHandle(hSnapshot);

 return id;
}