TGdkFunction

type TGdkFunction = (

  GDK_COPY,

  GDK_INVERT,

  GDK_XOR,

  GDK_CLEAR,

  GDK_AND,

  GDK_AND_REVERSE,

  GDK_AND_INVERT,

  GDK_NOOP,

  GDK_OR,

  GDK_EQUIV,

  GDK_OR_REVERSE,

  GDK_COPY_INVERT,

  GDK_OR_INVERT,

  GDK_NAND,

  GDK_NOR,

  GDK_SET

);