Section 3: VISA Textual Language Bindings Page 3-
1
VXIplug&play Systems Alliance VPP-4.3.2: VISA Impl. Spec. for Textual Languages
Section 3 VISA Textual Language Bindings
3.1 Type Assignments
Tables 3.1.1 and 3.1.2 give the type assignments for ANSI C and Visual Basic for each type defined in VPP-4.3.
Although ANSI C types can be defined in a header file, Visual Basic types cannot. Table 3.1.1 lists those types that
are both used and exported by direct users of VISA (such as instrument drivers). Table 3.1.2 lists types that may be
used but not exported by such users. For example, end-users would see the types specified in Table 3.1.1 exported
by the instrument driver; however, they would not see the types specified in Table 3.1.2.
Table 3.1.1. Type Assignments for VISA and Instrument Drivers
VISA Data Type
ANSI C Binding
Visual Basic
Binding
Description
ViUInt32
unsigned long
Long
A 32-bit unsigned integer.
ViPUInt32
ViUInt32 *
N/A
The location of a 32-bit unsigned integer.
ViAUInt32
ViUInt32[]
N/A
An array of 32-bit unsigned integers.
ViInt32
signed long
Long
A 32-bit signed integer.
ViPInt32
ViInt32 *
N/A
The location of a 32-bit signed integer.
ViAInt32
ViInt32[]
N/A
An array of 32-bit signed integers.
ViUInt64
Unsigned int64
or u_int64_t
N/A
A 64-bit unsigned integer. The exact type
definition depends on the compiler.
ViPUInt64
ViUInt64 *
N/A
The location of a 64-bit unsigned integer.
ViAUInt64
ViUInt64[]
N/A
An array of 64-bit unsigned integers.
ViInt64
signed int64 or
int64_t
N/A
A 64-bit signed integer. The exact type
definition depends on the compiler.
ViPInt64
ViInt64 *
N/A
The location of a 64-bit signed integer.
ViAInt64
ViInt64[]
N/A
An array of 64-bit signed integers.
ViUInt16
unsigned short
Integer
A 16-bit unsigned integer.
ViPUInt16
ViUInt16 *
N/A
The location of a 16-bit unsigned integer.
ViAUInt16
ViUInt16[]
N/A
An array of 16-bit unsigned integers.
ViInt16
signed short
Integer
A 16-bit signed integer.
ViPInt16
ViInt16 *
N/A
The location of a 16-bit signed integer.
ViAInt16
ViInt16[]
N/A
An array of 16-bit signed integers.
ViUInt8
unsigned char
Integer/
Byte
An 8-bit unsigned integer.
ViPUInt8
ViUInt8 *
N/A
The location of an 8-bit unsigned integer.
ViAUInt8
ViUInt8[]
N/A
An array of 8-bit unsigned integers.
(continues)
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