Suspend / Resume process

typedef LONG (NTAPI *NtSuspendProcess)(IN HANDLE ProcessHandle);
typedef LONG (NTAPI *NtResumeProcess)(IN HANDLE ProcessHandle);

/* ... */

void ProcessSuspend(DWORD PID)
{
 HANDLE hProcess = OpenProcess(PROCESS_SUSPEND_RESUME, FALSE, PID);
 if(!hProcess){
  printf("OpenProcess failed. ErrorCode:0x%08X\n", GetLastError());
  return;
 }

 NtSuspendProcess _NtSuspendProcess = (NtSuspendProcess)GetProcAddress(GetModuleHandle("ntdll"), "NtSuspendProcess");

 _NtSuspendProcess(hProcess);

 CloseHandle(hProcess);
}

void ProcessResume(DWORD PID)
{
 HANDLE hProcess = OpenProcess(PROCESS_SUSPEND_RESUME, FALSE, PID);
 if(!hProcess){
  printf("OpenProcess failed. ErrorCode:0x%08X\n", GetLastError());
  return;
 }

 NtResumeProcess _NtResumeProcess = (NtResumeProcess)GetProcAddress(GetModuleHandle("ntdll.dll"), "NtResumeProcess");

 _NtResumeProcess(hProcess);

 CloseHandle(hProcess);

 return;
}