diff --git a/examples/menu.cpp b/examples/menu.cpp
index a51759e9..68cd77bb 100644
--- a/examples/menu.cpp
+++ b/examples/menu.cpp
@@ -94,8 +94,8 @@ Menu::Menu (FWidget* parent)
   defaultCallback (Menubar);
 
   // Statusbar at the bottom
-  FStatusBar* statusbar = new FStatusBar (this);
-  statusbar->setMessage("Status bar message");
+  FStatusBar* Statusbar = new FStatusBar (this);
+  Statusbar->setMessage("Status bar message");
 
   // Headline labels
   FLabel* Headline1 = new FLabel(" Key ", this);
diff --git a/examples/mouse.cpp b/examples/mouse.cpp
index 60e4594d..ebd13e8e 100644
--- a/examples/mouse.cpp
+++ b/examples/mouse.cpp
@@ -481,11 +481,11 @@ void MouseDraw::drawCanvas()
 
   for (int y = 0; y < y_end; y++)  // line loop
   {
-    charData* cc;  // canvas character
-    charData* wc;  // window character
-    cc = &canvas->text[y * x_end];
-    wc = &print_area->text[(ay + y) * w_line_len + ax];
-    std::memcpy (wc, cc, sizeof(charData) * unsigned(x_end));
+    charData* canvaschar;  // canvas character
+    charData* winchar;     // window character
+    canvaschar = &canvas->text[y * x_end];
+    winchar = &print_area->text[(ay + y) * w_line_len + ax];
+    std::memcpy (winchar, canvaschar, sizeof(charData) * unsigned(x_end));
 
     if ( short(print_area->changes[ay + y].xmin) > ax )
       print_area->changes[ay + y].xmin = uInt(ax);
diff --git a/examples/transparent.cpp b/examples/transparent.cpp
index bc93df49..cdcc3b81 100644
--- a/examples/transparent.cpp
+++ b/examples/transparent.cpp
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2016-2017 Markus Gans                                      *
+* Copyright 2016-2018 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -212,8 +212,8 @@ MainWindow::MainWindow (FWidget* parent)
   ibg->unsetTransparentShadow();
 
   // Statusbar at the bottom
-  FStatusBar* statusbar = new FStatusBar (this);
-  statusbar->setMessage("Press Q to quit");
+  FStatusBar* status_bar = new FStatusBar (this);
+  status_bar->setMessage("Press Q to quit");
 
   addAccelerator('q');
   unsetTransparentShadow();
diff --git a/examples/ui.cpp b/examples/ui.cpp
index c755ddd0..6f455207 100644
--- a/examples/ui.cpp
+++ b/examples/ui.cpp
@@ -555,12 +555,12 @@ void MyDialog::initHelpMenuCallback()
 void MyDialog::initStatusBar()
 {
   // Statusbar at the bottom
-  FStatusBar* statusbar = new FStatusBar (this);
+  FStatusBar* Statusbar = new FStatusBar (this);
 
   // Statusbar keys
-  key_F1 = new FStatusKey (fc::Fkey_f1, "About", statusbar);
-  key_F2 = new FStatusKey (fc::Fkey_f2, "View", statusbar);
-  key_F3 = new FStatusKey (fc::Fkey_f3, "Quit", statusbar);
+  key_F1 = new FStatusKey (fc::Fkey_f1, "About", Statusbar);
+  key_F2 = new FStatusKey (fc::Fkey_f2, "View", Statusbar);
+  key_F3 = new FStatusKey (fc::Fkey_f3, "Quit", Statusbar);
 }
 
 //----------------------------------------------------------------------
diff --git a/examples/windows.cpp b/examples/windows.cpp
index f5de2e6c..0c6cb4cb 100644
--- a/examples/windows.cpp
+++ b/examples/windows.cpp
@@ -229,7 +229,7 @@ Window::Window (FWidget* parent)
   FDialogListMenu* DglList;
   FString drop_down_symbol;
   FMenuBar* Menubar;
-  FStatusBar* statusbar;
+  FStatusBar* Statusbar;
 
   // Menu bar
   Menubar = new FMenuBar (this);
@@ -250,8 +250,8 @@ Window::Window (FWidget* parent)
   createDialogButtons();
 
   // Statusbar at the bottom
-  statusbar = new FStatusBar (this);
-  statusbar->setMessage("Status bar message");
+  Statusbar = new FStatusBar (this);
+  Statusbar->setMessage("Status bar message");
 
   // Generate data vector for the windows
   for (int n = 1; n <= 6; n++)
diff --git a/include/final/fcolorpalette.h b/include/final/fcolorpalette.h
index d6b338be..3c0bf64c 100644
--- a/include/final/fcolorpalette.h
+++ b/include/final/fcolorpalette.h
@@ -44,6 +44,9 @@
 class FColorPalette
 {
   public:
+    // Destructor
+    virtual ~FColorPalette() = 0;
+
     // Typedefs
     typedef void (*funcp)(short, int, int, int);
 
diff --git a/src/fapplication.cpp b/src/fapplication.cpp
index 93dfa9f9..3ef372ec 100644
--- a/src/fapplication.cpp
+++ b/src/fapplication.cpp
@@ -869,12 +869,12 @@ void FApplication::unselectMenubarItems()
   if ( open_menu || (mouse && mouse->isMoved()) )
     return;
 
-  FMenuBar* menubar = getMenuBar();
+  FMenuBar* menu_bar = getMenuBar();
 
-  if ( ! menubar )
+  if ( ! menu_bar )
     return;
 
-  if ( ! menubar->hasSelectedItem() )
+  if ( ! menu_bar->hasSelectedItem() )
     return;
 
   if ( ! mouse )
diff --git a/src/fmenu.cpp b/src/fmenu.cpp
index de6ae73b..1bec754c 100644
--- a/src/fmenu.cpp
+++ b/src/fmenu.cpp
@@ -143,18 +143,18 @@ void FMenu::hide()
 //----------------------------------------------------------------------
 void FMenu::onKeyPress (FKeyEvent* ev)
 {
-  FWidget* menubar;
+  FWidget* menu_bar;
 
   // looking for menu hotkey
   if ( hotkeyMenu(ev) )
     return;
 
   // looking for menu bar hotkey
-  menubar = getMenuBar();
+  menu_bar = getMenuBar();
 
-  if ( menubar )
+  if ( menu_bar )
   {
-    FMenuBar* mbar = static_cast<FMenuBar*>(menubar);
+    FMenuBar* mbar = static_cast<FMenuBar*>(menu_bar);
 
     if ( mbar->hotkeyMenu(ev) )
       return;
@@ -1004,16 +1004,16 @@ void FMenu::passEventToMenuBar (FMouseEvent*& ev)
 {
   // Mouse event handover to the menu bar
 
-  FWidget* menubar = getMenuBar();
+  FWidget* menu_bar = getMenuBar();
   const FPoint& t = ev->getTermPos();
-  const FPoint& p = menubar->termToWidgetPos(t);
+  const FPoint& p = menu_bar->termToWidgetPos(t);
   int b = ev->getButton();
 
   try
   {
     FMouseEvent* _ev = new FMouseEvent (fc::MouseMove_Event, p, t, b);
-    setClickedWidget(menubar);
-    FMenuBar* mbar = static_cast<FMenuBar*>(menubar);
+    setClickedWidget(menu_bar);
+    FMenuBar* mbar = static_cast<FMenuBar*>(menu_bar);
     mbar->mouse_down = true;
     mbar->onMouseMove(_ev);
     delete _ev;
diff --git a/src/fmouse.cpp b/src/fmouse.cpp
index ff9adb54..740f8206 100644
--- a/src/fmouse.cpp
+++ b/src/fmouse.cpp
@@ -519,22 +519,22 @@ void FMouseX11::processEvent (struct timeval* time)
 
   const FPoint& mouse_position = getPos();
   uChar x, y;
-  int button;
+  int btn;
 
   x = uChar(x11_mouse[1] - 0x20);
   y = uChar(x11_mouse[2] - 0x20);
-  button = x11_mouse[0];
+  btn = x11_mouse[0];
   new_mouse_position.setPoint (x, y);
   // Fill bit field with 0
   std::memset(&b_state, 0x00, sizeof(b_state));
-  setKeyState (button);
-  setMoveState (mouse_position, button);
-  setButtonState (button & button_mask, time);
+  setKeyState (btn);
+  setMoveState (mouse_position, btn);
+  setButtonState (btn & button_mask, time);
 
   if ( new_mouse_position == mouse_position
     && ! isWheelUp()
     && ! isWheelDown()
-    && uChar(button) == x11_button_state )
+    && uChar(btn) == x11_button_state )
   {
     mouse_event_occurred = false;
     x11_mouse[0] = '\0';  // Delete already interpreted data
@@ -544,7 +544,7 @@ void FMouseX11::processEvent (struct timeval* time)
   mouse_event_occurred = true;
   setPos (FPoint(x, y));
   // Get the button state from string
-  x11_button_state = uChar(button);
+  x11_button_state = uChar(btn);
   // Delete already interpreted data
   x11_mouse[0] = '\0';
 }
@@ -552,23 +552,23 @@ void FMouseX11::processEvent (struct timeval* time)
 
 // private methods of FMouseX11
 //----------------------------------------------------------------------
-void FMouseX11::setKeyState (int button)
+void FMouseX11::setKeyState (int btn)
 {
-  if ( (button & key_shift) == key_shift )
+  if ( (btn & key_shift) == key_shift )
     b_state.shift_button = Pressed;
 
-  if ( (button & key_meta) == key_meta )
+  if ( (btn & key_meta) == key_meta )
     b_state.meta_button = Pressed;
 
-  if ( (button & key_ctrl) == key_ctrl )
+  if ( (btn & key_ctrl) == key_ctrl )
     b_state.control_button = Pressed;
 }
 
 //----------------------------------------------------------------------
-void FMouseX11::setMoveState (const FPoint& mouse_position, int button)
+void FMouseX11::setMoveState (const FPoint& mouse_position, int btn)
 {
-  if ( (button & button_mask) >= button1_pressed_move
-    && (button & button_mask) <= button3_pressed_move
+  if ( (btn & button_mask) >= button1_pressed_move
+    && (btn & button_mask) <= button3_pressed_move
     && mouse_position != zero_point )
   {
     b_state.mouse_moved = true;
@@ -576,13 +576,13 @@ void FMouseX11::setMoveState (const FPoint& mouse_position, int button)
 }
 
 //----------------------------------------------------------------------
-void FMouseX11::setButtonState (int button, struct timeval* time)
+void FMouseX11::setButtonState (int btn, struct timeval* time)
 {
   // Get the x11 mouse button state
 
   const FPoint& mouse_position = getPos();
 
-  switch ( button )
+  switch ( btn )
   {
     case button1_pressed:
     case button1_pressed_move:
@@ -723,12 +723,12 @@ void FMouseSGR::processEvent (struct timeval* time)
 {
   const FPoint& mouse_position = getPos();
   register char* p;
-  int button;
+  int btn;
   short x, y;
 
   x = 0;
   y = 0;
-  button = 0;
+  btn = 0;
 
   // parse the SGR mouse string
   p = sgr_mouse;
@@ -742,7 +742,7 @@ void FMouseSGR::processEvent (struct timeval* time)
       return;
     }
 
-    button = 10 * button + (*p - '0');
+    btn = 10 * btn + (*p - '0');
     p++;
   }
 
@@ -773,18 +773,18 @@ void FMouseSGR::processEvent (struct timeval* time)
   new_mouse_position.setPoint (x, y);
   // Fill bit field with 0
   std::memset(&b_state, 0x00, sizeof(b_state));
-  setKeyState (button);
-  setMoveState (mouse_position, button);
+  setKeyState (btn);
+  setMoveState (mouse_position, btn);
 
   if ( *p == pressed )
-    setPressedButtonState (button & button_mask, time);
+    setPressedButtonState (btn & button_mask, time);
   else  // *p == released
-    setReleasedButtonState (button & button_mask);
+    setReleasedButtonState (btn & button_mask);
 
   if ( mouse_position == new_mouse_position
     && ! isWheelUp()
     && ! isWheelDown()
-    && sgr_button_state == uChar(((*p & 0x20) << 2) + button) )
+    && sgr_button_state == uChar(((*p & 0x20) << 2) + btn) )
   {
     mouse_event_occurred = false;
     sgr_mouse[0] = '\0';  // Delete already interpreted data
@@ -794,30 +794,30 @@ void FMouseSGR::processEvent (struct timeval* time)
   mouse_event_occurred = true;
   setPos (FPoint(x, y));
   // Get the button state from string
-  sgr_button_state = uChar(((*p & 0x20) << 2) + button);
+  sgr_button_state = uChar(((*p & 0x20) << 2) + btn);
   // Delete already interpreted data
   sgr_mouse[0] = '\0';
 }
 
 // private methods of FMouseSGR
 //----------------------------------------------------------------------
-void FMouseSGR::setKeyState (int button)
+void FMouseSGR::setKeyState (int btn)
 {
-  if ( (button & key_shift) == key_shift )
+  if ( (btn & key_shift) == key_shift )
     b_state.shift_button = true;
 
-  if ( (button & key_meta) == key_meta )
+  if ( (btn & key_meta) == key_meta )
     b_state.meta_button = true;
 
-  if ( (button & key_ctrl) == key_ctrl )
+  if ( (btn & key_ctrl) == key_ctrl )
     b_state.control_button = true;
 }
 
 //----------------------------------------------------------------------
-void FMouseSGR::setMoveState (const FPoint& mouse_position, int button)
+void FMouseSGR::setMoveState (const FPoint& mouse_position, int btn)
 {
-  if ( (button & button_mask) >= button1_move
-    && (button & button_mask) <= button3_move
+  if ( (btn & button_mask) >= button1_move
+    && (btn & button_mask) <= button3_move
     && mouse_position != zero_point )
   {
     b_state.mouse_moved = true;
@@ -825,13 +825,13 @@ void FMouseSGR::setMoveState (const FPoint& mouse_position, int button)
 }
 
 //----------------------------------------------------------------------
-void FMouseSGR::setPressedButtonState (int button, struct timeval* time)
+void FMouseSGR::setPressedButtonState (int btn, struct timeval* time)
 {
   // Gets the extended x11 mouse mode (SGR) status for pressed buttons
 
   const FPoint& mouse_position = getPos();
 
-  switch ( button )
+  switch ( btn )
   {
     case button1:
     case button1_move:
@@ -882,11 +882,11 @@ void FMouseSGR::setPressedButtonState (int button, struct timeval* time)
 }
 
 //----------------------------------------------------------------------
-void FMouseSGR::setReleasedButtonState (int button)
+void FMouseSGR::setReleasedButtonState (int btn)
 {
   // Gets the extended x11 mouse mode (SGR) status for released buttons
 
-  switch ( button )
+  switch ( btn )
   {
     case button1:
     case button1_move:
@@ -980,12 +980,12 @@ void FMouseUrxvt::processEvent (struct timeval* time)
   register char* p;
   register bool x_neg;
   register bool y_neg;
-  int button;
+  int btn;
   short x, y;
 
   x = 0;
   y = 0;
-  button = 0;
+  btn = 0;
 
   // Parse the Urxvt mouse string
   p = urxvt_mouse;
@@ -1001,7 +1001,7 @@ void FMouseUrxvt::processEvent (struct timeval* time)
       return;
     }
 
-    button = 10 * button + (*p - '0');
+    btn = 10 * btn + (*p - '0');
     p++;
   }
 
@@ -1058,14 +1058,14 @@ void FMouseUrxvt::processEvent (struct timeval* time)
   new_mouse_position.setPoint (x, y);
   // Fill bit field with 0
   std::memset(&b_state, 0x00, sizeof(b_state));
-  setKeyState (button);
-  setMoveState (mouse_position, button);
-  setButtonState (button & button_mask, time);
+  setKeyState (btn);
+  setMoveState (mouse_position, btn);
+  setButtonState (btn & button_mask, time);
 
   if ( mouse_position == new_mouse_position
     && ! isWheelUp()
     && ! isWheelDown()
-    && urxvt_button_state == uChar(button) )
+    && urxvt_button_state == uChar(btn) )
   {
     mouse_event_occurred = false;
     urxvt_mouse[0] = '\0';  // Delete already interpreted data
@@ -1074,7 +1074,7 @@ void FMouseUrxvt::processEvent (struct timeval* time)
 
   mouse_event_occurred = true;
   setPos (FPoint(x, y));
-  urxvt_button_state = uChar(button);
+  urxvt_button_state = uChar(btn);
   // Delete already interpreted data
   urxvt_mouse[0] = '\0';
 }
@@ -1082,23 +1082,23 @@ void FMouseUrxvt::processEvent (struct timeval* time)
 
 // private methods of FMouseUrxvt
 //----------------------------------------------------------------------
-void FMouseUrxvt::setKeyState (int button)
+void FMouseUrxvt::setKeyState (int btn)
 {
-  if ( (button & key_shift) == key_shift )
+  if ( (btn & key_shift) == key_shift )
     b_state.shift_button = Pressed;
 
-  if ( (button & key_meta) == key_meta )
+  if ( (btn & key_meta) == key_meta )
     b_state.meta_button = Pressed;
 
-  if ( (button & key_ctrl) == key_ctrl )
+  if ( (btn & key_ctrl) == key_ctrl )
     b_state.control_button = Pressed;
 }
 
 //----------------------------------------------------------------------
-void FMouseUrxvt::setMoveState (const FPoint& mouse_position, int button)
+void FMouseUrxvt::setMoveState (const FPoint& mouse_position, int btn)
 {
-  if ( (button & button_mask) >= button1_pressed_move
-    && (button & button_mask) <= button3_pressed_move
+  if ( (btn & button_mask) >= button1_pressed_move
+    && (btn & button_mask) <= button3_pressed_move
     && mouse_position != zero_point )
   {
     b_state.mouse_moved = true;
@@ -1106,13 +1106,13 @@ void FMouseUrxvt::setMoveState (const FPoint& mouse_position, int button)
 }
 
 //----------------------------------------------------------------------
-void FMouseUrxvt::setButtonState (int button, struct timeval* time)
+void FMouseUrxvt::setButtonState (int btn, struct timeval* time)
 {
   // Get the urxvt mouse button state
 
   const FPoint& mouse_position = getPos();
 
-  switch ( button )
+  switch ( btn )
   {
     case button1_pressed:
     case button1_pressed_move:
diff --git a/src/ftermdetection.cpp b/src/ftermdetection.cpp
index 25a6a7bd..18b7b7a3 100644
--- a/src/ftermdetection.cpp
+++ b/src/ftermdetection.cpp
@@ -332,9 +332,12 @@ char* FTermDetection::init_256colorTerminal()
 
 #if DEBUG
   if ( new_termtype )
+  {
     std::strncpy ( termtype_256color
                  , new_termtype
-                 , std::strlen(new_termtype) + 1 );
+                 , sizeof(termtype_256color) );
+    termtype_256color[sizeof(termtype_256color) - 1] = '\0';
+  }
 #endif
 
   return new_termtype;
@@ -472,7 +475,7 @@ const FString FTermDetection::getXTermColorName (int color)
   int stdin_no = FTermios::getStdIn();
 
   char temp[512] = { };
-  FTerm::putstringf (OSC "4;%d;?" BEL, color);  // get color
+  std::fprintf (stdout, OSC "4;%d;?" BEL, color);  // get color
   std::fflush(stdout);
 
   FD_ZERO(&ifds);
@@ -534,9 +537,12 @@ char* FTermDetection::parseAnswerbackMsg (char current_termtype[])
 
 #if DEBUG
   if ( new_termtype )
+  {
     std::strncpy ( termtype_Answerback
                  , new_termtype
-                 , std::strlen(new_termtype) + 1 );
+                 , sizeof(termtype_Answerback) );
+    termtype_Answerback[sizeof(termtype_Answerback) - 1] = '\0';
+  }
 #endif
 
   return new_termtype;
@@ -648,9 +654,10 @@ char* FTermDetection::parseSecDA (char current_termtype[])
 
 #if DEBUG
   if ( new_termtype )
-    std::strncpy ( termtype_SecDA
-                 , new_termtype
-                 , std::strlen(new_termtype) + 1 );
+  {
+    std::strncpy (termtype_SecDA, new_termtype, sizeof(termtype_SecDA));
+    termtype_SecDA[sizeof(termtype_SecDA) - 1] = '\0';
+  }
 #endif
 
   return new_termtype;
@@ -664,16 +671,13 @@ const FString FTermDetection::getSecDA()
   int a = 0
     , b = 0
     , c = 0
-    , stdin_no = FTermios::getStdIn();
+    , stdin_no = FTermios::getStdIn()
+    , stdout_no = FTermios::getStdOut();
   fd_set ifds;
   struct timeval tv;
 
   // Get the secondary device attributes
-#if defined(__CYGWIN__)
-  puts (SECDA);
-#else
-  FTerm::putstring (SECDA);
-#endif
+  write(stdout_no, SECDA, std::strlen(SECDA));
   std::fflush(stdout);
 
   FD_ZERO(&ifds);
diff --git a/src/fvterm.cpp b/src/fvterm.cpp
index 665114ef..2a866696 100644
--- a/src/fvterm.cpp
+++ b/src/fvterm.cpp
@@ -2114,15 +2114,15 @@ void FVTerm::init()
 }
 
 //----------------------------------------------------------------------
-void FVTerm::init_characterLengths (FOptiMove* opti_move)
+void FVTerm::init_characterLengths (FOptiMove* optimove)
 {
-  if ( opti_move )
+  if ( optimove )
   {
-    cursor_address_length = opti_move->getCursorAddressLength();
-    erase_char_length     = opti_move->getEraseCharsLength();
-    repeat_char_length    = opti_move->getRepeatCharLength();
-    clr_bol_length        = opti_move->getClrBolLength();
-    clr_eol_length        = opti_move->getClrEolLength();
+    cursor_address_length = optimove->getCursorAddressLength();
+    erase_char_length     = optimove->getEraseCharsLength();
+    repeat_char_length    = optimove->getRepeatCharLength();
+    clr_bol_length        = optimove->getClrBolLength();
+    clr_eol_length        = optimove->getClrEolLength();
   }
   else
   {