C / C++ / MFC

void YourDialog::SomeMethod()
{
   const CSize szOffset(355, -5);    // or whatever offset you need
 
   // Make the offset on client coordinates
   // so that you don't depend on title and border sizes
   CPoint ptPosition(0,0);
   ptPosition += szOffset;
 
   // Convert to screen coordinates if needed.
   // IF m_EQS is a child window, delete the following line
   ClientToScreen(ptPosition);

   m_EQS->SetWindowPos(&wndTop, ptPosition.x, ptPosition.y, 0, 0, SWP_NOSIZE);
   m_EQS->ShowWindow(TRUE);
}

void YourDialog::SomeMethod()
{
   CPoint ptPosition(0,0);
 
   // Get placeholder control
   CWnd* pPlaceHolder = GetDlgItem(IDC_PLACEHOLDER);
   ASSERT(pPlaceHolder);
   if (pPlaceHolder)
   {
      // Move the insertion point to the
      // placeholder's top left client coordinates
      CRect rPos;
      pPlaceHolder->GetWindowRect(rPos);
      ScreenToClient(rPos);
 
      ptPosition = rPos.TopLeft();
   }
 
   // Convert to screen coordinates if needed.
   // IF m_EQS is a child window, delete the following line
   ClientToScreen(ptPosition);

   m_EQS->SetWindowPos(&wndTop, ptPosition.x, ptPosition.y, 0, 0, SWP_NOSIZE);
   m_EQS->ShowWindow(TRUE);
}