Information
1.20 Information
| Erl Property |
|
|
|
|
See Erl Property under Section 1.17.
| IsArray Function |
|
|
|
|
See IsArray Function entry under Section 1.11.
| IsDate Function | Microsoft.VisualBasic.Information |
IsDate(expression) |
|
expression required; any
Expression containing a date or time
Return Value
Boolean indicating whether the expression can be converted to a Date
Description
Determines if an expression is of type Date or can be converted to type Date
Returns True ifexpression is of type Date or can be converted to type Date. Uninitialized date variables also return True.
| IsDBNull Function | Microsoft.VisualBasic.Information |
IsDBNull(expression) |
|
expression required; any expression
Any value retrieved from or to be written to a database
Return Value
Boolean
Description
Determines whether expression evaluates to DbNull (that is, is equal to System.DbNull.Value).
| IsError Function |
|
|
|
|
See IsError Function under Section 1.17.
| IsNothing Function | Microsoft.VisualBasic.Information |
IsNothing(expression) |
|
expression required; any
Any variable or expression to be tested for a null object reference
Return Value
Boolean
Description
Determines whether expression evaluates to Nothing. The line:
If IsNothing(obj) Then is equivalent to:
If obj Is Nothing Then | IsNumeric Function | Microsoft.VisualBasic.Information |
IsNumeric(expression) |
|
expression required; any expression
An expression to be converted to a number
Return Value
Boolean
Description
Determines whether expression can be evaluated as a number. If the expression passed to IsNumeric evaluates to a number, True is returned; otherwise, IsNumeric returns False.
| IsReference Function | Microsoft.VisualBasic.Information |
IsReference(expression) |
|
expression required; any
Any potential reference type
Return Value
Boolean
Description
Returns True if expression contains reference type data, as opposed to value type data.
| RGB Function |
|
|
|
|
See RGB Function under Section 1.14.
| Rem Statement |
|
Rem comment ' comment |
|
comment optional
A textual comment to place within the code
Description
Use the Rem statement or an apostrophe (') to place remarks within the code.
| ScriptEngine Property | Microsoft.VisualBasic.Globals |
ScriptEngine |
|
Return Value
A String containing the value "VB"
Description
Indicates the programming language currently in use.
| ScriptEngineBuildVersion Property | Microsoft.VisualBasic.Globals |
ScriptEngineBuildVersion( ) |
|
Return Value
An Integer containing the build number
Description
Returns the build number of the VB.NET language engine.
| ScriptEngineMajorVersion Property | Microsoft.VisualBasic.Globals |
ScriptEngineMajorVersion |
|
Return Value
An Integer containing the major version number
Description
Indicates the major version (1, 2, etc.) of the programming language currently in use.
| ScriptEngineMinorVersion Property | Microsoft.VisualBasic.Globals |
ScriptEngineMinorVersion |
|
Return Value
An Integer containing the minor version number
Description
Indicates the minor version (the number to the right of the decimal point) of the programming language currently in use.
| SystemTypeName Function | Microsoft. VisualBasic.Information |
SystemTypeName(vbname) |
|
vbname required; String
The name of a VB.NET data type
Return Value
A String indicating the name of a CTS data type
Description
Returns the fully qualified type name of the CTS data type that corresponds to a particular Visual Basic data type.
| TypeName Function | Microsoft.VisualBasic.Information |
TypeName(varname) |
|
varname required; String literal
Name of a variable
Return Value
String
Description
Returns a string giving data type information about varname. The possible return values are:
| String returned | Variable contents |
| Boolean | 8-bit True or False value type |
| Byte | 8-bit binary value type |
| Char | 16-bit character value type |
| Date | 64-bit date and time value type |
| DBNull | Reference type indicating missing or nonexistent data |
| Decimal | 96-bit fixed point numeric value type |
| Double | 64-bit floating point numeric value type |
| Error | Error object |
| Integer | 32-bit integer value type |
| Long | 64-bit integer value type |
| Nothing | Object variable with no object currently assigned to it, uninitialized string, or undimensioned array |
| Object | Reference type pointing to an unspecialized object |
| Short | 16-bit integer value type |
| Single | 32-bit floating point numeric value type |
| String | Reference type pointing to a string of 16-bit characters |
| <objectclass> | Reference type pointing to a specialized object created from class <objectclass> |
| <structure> | A variable created from a structure or user-defined type named structure |
| <typename>( ) | Dimensioned array |
| VarType Function | Microsoft.VisualBasic.Information |
VarType(varname) |
|
varname required; any
The name of a variable
Return Value
A member of the VariantType enumeration indicating the variable type
Description
Determines the data type of a variable.
| VbTypeName Function | Microsoft. VisualBasic.Information |
VbTypeName(urtname) |
|
urtname required; String
The name of a CTS datatype
Return Value
A String containing the name of a VB.NET datatype
Description
Returns the name of the VB.NET datatype that corresponds to a particular CTS datatype.
EAN: 2147483647
Pages: 31