GetFocused	returns window that has the keyboard focus
RegisterClass	registers a window class
Sleep	suspends running thread
LowWord	returns low word of the specified Long value
HighWord	returns high word of the specified Long value
MakeLong	returns long value constructed from low and high words
LowByte	returns low byte of the specified word value
HighByte	returns high byte of the specified word value
MakeWord	returns word value constructed from low and high bytes