DWORD GetCurrentTime( )
This function retrieves the current Windows time. Windows time is the number of milliseconds that have elapsed since the system was booted.
This function has no parameters.
The return value specifies the current time (in milliseconds).
The GetCurrentTime and GetMessageTime functions return different times.
GetMessageTime returns the Windows time when the given message was created,
not the current Windows time.
The system timer eventually overflows and resets to zero.