This article reviews works by the author and his colleagues where a novel technique for quick change of supersaturation by dynamic pressure-control (DPC) method is used for studies of crystal growth. Since the DPC method can change supersaturation much faster than the ordinary temperature-control method, it is very suitable for quick experiments in microgravity. Here we report an in situ observation experiment of a dendritic crystal growth in microgravity by the DPC method.