//sys	SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff]
//sys	CloseHandle(handle Handle) (err error)
//sys	GetStdHandle(stdhandle uint32) (handle Handle, err error) [failretval==InvalidHandle]
//sys	SetStdHandle(stdhandle uint32, handle Handle) (err error)

//sys	SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff]
//sys	CloseHandle(handle Handle) (err error)
//sys	GetStdHandle(stdhandle int) (handle Handle, err error) [failretval==InvalidHandle]

	procCancelIo                           = modkernel32.NewProc("CancelIo")
	procCancelIoEx                         = modkernel32.NewProc("CancelIoEx")
	procCloseHandle                        = modkernel32.NewProc("CloseHandle")
	procCreateDirectoryW                   = modkernel32.NewProc("CreateDirectoryW")
	procCreateFileMappingW                 = modkernel32.NewProc("CreateFileMappingW")

// not need to be closed.
func GetCurrentThreadEffectiveToken() Token {
	return Token(^uintptr(6 - 1))
}

// Close releases access to access token.
func (t Token) Close() error {
	return CloseHandle(Handle(t))
}

// getInfo retrieves a specified type of information about an access token.
func (t Token) getInfo(class uint32, initSize int) (unsafe.Pointer, error) {
	n := uint32(initSize)
	for {