Whether the identifier denotes an object of user-defined type or a type derived from a user-defined type. Whether the identifier denotes a function or a type derived from a function. The number of arguments to a function. The dollar sign is also a valid identifier in Visual C++.
Known to ancient Egyptians, watercolor painting is one of the oldest art forms. Artists from medieval times used watercolors for the illumination of parchment papers, but during the 16th, 17th and 18th centuries, watercolors were restricted to miniature paintings on card, ivory, parchment or porcelain.
Liquid Watercolors contain dyes as well as pigments, suspended in an aqueous medium. They are especially brilliant and transparent. Because they are moist and fluid, they are suited to thin washes and airbrush application as well as conventional brushwork. Many of the more brilliant colors are fugitive, so liquid watercolors are used most often for illustrations that will be scanned for reproduction.