Visual Basic 2005 in a Nutshell, Third Edition

Variables | 61

Variables and

Data Types

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Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

CShort Function

Converts any numeric expression in the range of a

Short to Short, rounding

any fractional part.

CSng Function

Converts any numeric expression in the range of a Single to Single.

CStr Function

Converts an expression to its string representation. Boolean values are

converted to either “True” or “False.” Dates are converted based on the date

format defined by the regional settings of the host computer.

CType Function

Provides generalized casting, allowing an object or expression of any type to

be converted to another type. It works with all classes, structures, and inter-

faces. This applies to both the basic data types and custom classes. The

function has the following syntax:

CType(expression, typename)

For instance, the statement:

Dim targetNumber As Integer = CType("12", Integer)

is equivalent to:

Dim targetNumber As Integer = CInt("12")

New in 2005. The 2005 release of Visual Basic adds operator overloading

features, described in Chapter 5. One component of operator overloading is

the ability to define

CType conversion rules for your own custom classes.

CUInteger Function

New in 2005. Converts any numeric expression in the range of a

UInteger to

UInteger, rounding any fractional part.

CULong Function

New in 2005. Converts any numeric expression ...