Window with DEFAULT (-1) Style:
  GUICreate [640x480]: Client Area is 640x480 because it actually is 646x505
  WinMove   [640x480]: Client Area is 634x455 because it actually is 640x480

Window with $WS_SIZEBOX+$WS_SYSMENU Style:
  GUICreate [640x480]: Client Area is 638x459 because it actually is 646x486
  WinMove   [640x480]: Client Area is 632x453 because it actually is 640x480