Visual Basic Family Compared to ViviFire

ViviFire has many of the same features as Visual Basic and VB.NET. This appendix tries to show what is different.

Equivalent features

Feature	Shared	Different
Arithmetic operators	`+`, `-`, `*`, `/`, `\`, `Mod`, `^`
Assignment operators	`&=`, `+=`, `-=`, `*=`, `/=`, `\=`	Does not have `^=`. `<<=` → `SHL=`, `>>=` → `SHR=`
`Call`	Almost the same
Comparison Operators	Almost the same
`Const`	Almost the same
`Do…Loop`	Almost the same
`Exit`	Almost the same	Does not have `Exit Select`.
`For`	Almost the same	`Next` → `End For`
`If…Else`	Almost the same	`ElseIf` → `Else If`
Logical and bitwise operators	`And`, `Or`, `Xor`	`AndAlso` → `And Then`, `OrElse` → `Or Else`
`ReDim`	Almost the same	Does not have `Preserve`.
`Return`	Almost the same
`Select…Case`	Almost the same	`Is` is not optional.
`Try…Catch…Finally`	Almost the same	Does not have `Catch…When`
`While`	Almost the same	`Wend` → `End While`

The table that follows shows elements of VB that have a different name in ViviFire.

In VB	In ViviFire
`<<` and `>>`	`SHL` and `SHR`
`AddressOf`	`Sub` or `Function`
`Inherits`	`Is`, `Extends`, or `Inherits`
`Is` and `IsNot`	`Is`
`Me` and `MyBase`	`Self` and `Base`
`MustInherit` and `MustOverride`	`@Abstract`
`Overridable` and `Overrides`	`@Open` and `@Override`
`RaiseEvent`	`Raise Event`
`ReadOnly` and `WriteOnly`	`@ReadOnly` and `@WriteOnly`
`Shared` and `Static`	`@Shared`
`Throw`	`Raise`

In VB	In ViviFire	In VB	In ViviFire
`Boolean`	`Boolean`	`String`	`String`
`SByte`	`Int8`	`Byte`	`UInt8`
`Short`	`Int16`	`UShort`	`UInt16`
`Integer`	`Int32`	`UInteger`	`UInt32`
`Long`	`Int64`	`ULong`	`UInt64`
`Date`	`DateTime`	`Decimal`	`Fixed128`
`Single`	`Real32`	`Double`	`Real64`

ViviFire also has Int128, UInt128, Fixed64, and Real128.