uchar, ushort, uint, ulong

Defined internally as:

typedef unsigned char  uchar;          // Unsigned character (byte, 8 bits)
typedef unsigned short ushort;         // Unsigned short (word, 16 bits)
typedef unsigned int   uint;           // Unsigned integer (doubleword, 32 bits)
typedef unsigned long  ulong;          // Unsigned long (doubleword, 32 bits)