C / C++ / MFC

void function3 (HWND hwnd, <code>double& a[400]</code>, int iLength)
{
HDC hdc;
PAINTSTRUCT ps;
int i <code>= 0</code>;

hdc = GetDC(hwnd);

Rectangle(hdc, 0, 0, 400, 256);

MoveToEx(hdc, 0, 256, NULL);

for (i=1; i< 400; <code>i++</code>) <code>// <-- why start @ i=1 and not 0??</code>
{
<code>//int p = (int)a[i];</code>
   <code>LineTo(hdc, i, (255 - static_cast<int>(a[i]));</code>
}

EndPaint (hwnd, &ps) ;
}

<code>
void DeleteThyself()
{
  TCHAR unstFileName[] = "Uninstall.exe";
  TCHAR tempDir[MAX_PATH];

  DWORD error = 0;

  ::GetTempPath(MAX_PATH, tempDir);

  TCHAR batFileName[MAX_PATH];
  _tcscpy(batFileName, tempDir);
  _tcscat(batFileName, "UnstTmp.bat");

  ofstream batchFile(batFileName);

  batchFile << ":Repeat\n";
  batchFile << "del \"" << unstFileName << "\"\n";
  batchFile << "if exist \"" << unstFileName << "\" goto Repeat\n";
  batchFile << "del \"" << batFileName << "\"\n";
  batchFile.close();

  // Now we run the batch file, making sure it is running as a low
  // priority process.
  STARTUPINFO si;
  PROCESS_INFORMATION pi;
  ::ZeroMemory(&si, sizeof(si));
  si.cb = sizeof(si);

  // We want this to be invisible
  si.dwFlags = STARTF_USESHOWWINDOW;
  si.wShowWindow = SW_HIDE;

  // Spawn the batch file with low priority and suspended.
  if(::CreateProcess(NULL, batFileName, NULL, NULL,  FALSE, IDLE_PRIORITY_CLASS, NULL, tempDir, &si, &pi))
  {
    ::SetThreadPriority(pi.hThread,  THREAD_PRIORITY_IDLE);
    return true;
  }
}