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Navigation:  Language Reference > 3 - Variable Declarations > Data Types >====== ULONG (four-byte unsigned integer) ====== Previous pageReturn to chapter overviewNext page
label ULONG([initial value]) [,DIM( )] [,OVER( )] [,NAME( )] [,EXTERNAL] [,DLL] [,STATIC]


ULONG A four-byte unsigned integer.

Format:     magnitude


Bits:  31                  0

Range: 0 to 4,294,967,295

initial value A numeric constant. If omitted, the initial value is zero, unless the AUTO attribute is present.
DIM Dimension the variable as an array.
OVER Share a memory location with another variable.
NAME Specify an alternate, “external” name for the field.
EXTERNAL Specify the variable is defined, and its memory is allocated, in an external library. Not valid within FILE, QUEUE, or GROUP declarations.
DLL Specify the variable is defined in a .DLL. This is required in addition to the EXTERNAL attribute.
STATIC Specify the variable's memory is permanently allocated.
THREAD Specify memory for the variable is allocated once for each execution thread. Also implicitly adds the STATIC attribute on Procedure Local data.
AUTO Specify the variable has no initial value.
PRIVATE Specify the variable is not visible outside the module containing the CLASS methods. Valid only in a CLASS.
PROTECTED Specify the variable is not visible outside base CLASS and derived CLASS methods. Valid only in a CLASS.

ULONG declares a four-byte unsigned integer, using the Intel 8086 long integer format. There is no sign bit in this configuration.


The equivalent of a Win32 ULONG in Clarion.NET is the CLAULONG type. Use of ULONG in Clarion.NET programs are equivalent to the unsigned INT64 .NET data type.


Count1 ULONG                        !Declare four-byte unsigned integer

Count2 ULONG,OVER(Count1)           !Declare OVER four-byte unsigned integer

Count3 ULONG,DIM(4)                 !Declare it an array of 4 unsigned longs

Count4 ULONG(5)                     !Declare with initial value

Count5 ULONG,EXTERNAL               !Declare as external

Count6 ULONG,EXTERNAL,DLL           !Declare as external in a .DLL

Count7 ULONG,NAME('SixCount')       !Declare with external name

ExampleFile FILE,DRIVER('Btrieve')  !Declare a file

Record       RECORD

Count8        ULONG,NAME('Counter') !Declare with external name



ulong_four_byte_unsigned_integer_.htm.txt · Last modified: 2021/04/15 15:57 by