GDI: minor code formatting.
GDI: minor code formatting.

* also improved if..else for WindowType
* Moved AdjustWindowStyle to after all checks for WindowType
  so user could override it if needed.

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI