Inside Visual Studio.NET (6) _ Practical Tips

changes in Visual Basic

Characteristics
Describe

Bur and bitwise operators
And, or, Xor, and not are strict Boolean operators and can no longer be used for bitwise operations
。 Instead, you should use Bitand, Bitor, Bitxor, and Bitnot. Eqv and IMP are no longer supported.

Data type
Deftype statements (DefBool, DefByte, and so on) are no longer supported. The Currency type is replaced by the decimal type. Dates is now stored as a 8-byte integer to match the CLR DateTime type.

Dim, ReDim
You cannot use ReDim in the initial array declaration. You must first declare this array in dim. You can then use ReDim to change the size of the array.

Integer
Short refers to a 16-bit signed integer. Integer (type string is%) Refers to a 32-bit signed integer. A Long (type string of &) refers to a 64-bit signed integer.

String
The string type now corresponds to the. NET Framework string class and cannot be modified after initialization. If this string must be modified, you can use the StringBuilder class.

Variable scope
The scope of a variable declared in a program block is a program block rather than an entire process. The scope of a variable declared in a procedure rather than in a program block (a program block that is a group of statements ended by end, Loop, or next) is the entire process.

Variants variable
The variant is already replaced by object. But the variant is still the key word in this language.

Visual Basic. The elements of Visual Basic 6.0 that are no longer supported in net.

As any, Atn, Calendar, Circle, Currency, Date, date$, Debug.Assert, Debug.Print, Deftype, DoEvents, Empty, Eqv, GoSub, IMP , Initialize, instancing, IsEmpty, IsMissing, IsNull, IsObject, let, line, LSet, MsgBox, now, Null, on ... GoSub, on ... GoTo, option Base, option Private Module, Property Get, Property Let, property Set, PSet, Rnd, Round, RSet, Scale, Set, Sg N, SQR, String, Terminate, Time, time$, Timer, Variant, VarType, Wend.