This appendix provides an alphabetical list of language elements that are present in VB 6 but are not supported by Visual Basic .NET 2002, or in subsequent versions of the language. Several math-related functions, formerly part of the Visual Basic language but now located in the System.Math namespace, are not included in this appendix.
Table G-1. VB 6 elements no longer supported
Element | Description |
|---|
Array Function | Returns a variant array with elements that contain the values passed as arguments to the function |
Any Keyword | Used in Declare statements to indicate generic parameter data types; all parameters must now have a declared data type |
AscB Function | Returns an integer representing the character code of the first byte of a string |
Atn Function | Returns the arctangent of a number; replaced by the Atan method in the System.Math class |
Calendar Property | Determines whether a project should use the Gregorian or Hijri calendar; replaced by classes in the System.Globalization namespace |
CCur Function | Converts an expression into a Currency data type |
ChrB Function | Returns the character corresponding to an 8-bit character code |
Circle Method | Draws circles on a form, PictureBox control, or other drawing surface; replaced by features in the System.Drawing namespace |
Close Statement | Closes a file opened with the Open statement |
Currency Data Type | Data type for accurate financial calculations; replaced by the Decimal data type |
CVar Function | Converts an expression into a Variant data type |
CVDate Function | Returns a Date variant |
CVErr Function | Returns an error from a procedure |
Date, Date$ Functions | Returns the current system date; replaced by the DateTime.Today property |
Date Statement | Sets the current system date; replaced by the DateTime.Today property |
Debug.Assert Statement | Conditionally suspends execution based on a Boolean test; consider replacement with the Debug.Assert method in the System.Diagnostics namespace |
Debug.Print Statement | Sends output to the Immediate window; consider replacement with the Debug.WriteLine method and similar methods in the System.Diagnostics namespace |
DefBool Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Boolean |
DefByte Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Byte |
DefCur Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Currency |
DefDate Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Date |
Defdbl Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Double |
Defdec Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Decimal |
Defint Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Integer |
DefLng Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Long |
Defobj Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Object |
Defsng Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Single |
Defstr Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as String |
DefVar Statement | Defines all otherwise undeclared variables beginning with particular alphabetical characters as Variant |
DoEvents Statement | Releases control to the application's message queue; replaced with the DoEvents method in the Windows.Forms namespace, or in Visual Basic 2005 with the My.Application.DoEvents method |
Empty Keyword | Indicates an empty or uninitialized data value; replaced by the Nothing keyword |
Eqv Operator | Represents a logical equivalence operator; use the Equal To (=) comparison operator instead |
Error Function | Returns a standard description of a particular error code |
Get Statement | Retrieves data from a disk file into a program variable; replaced by the FileGet function |
GoSub...Return Statement | Passes execution to, and returns from, a block subroutine within a procedure |
Imestatus Function | Returns the state of the Input Method Editor, used for localized or specialized data input |
Imp Operator | Represents a logical implication operator; use the expression "(Not A) Or B" instead |
Initialize Event | Fires when an object is first used; use class constructors instead |
InputB, InputB$ Functions | Reads a designated number of characters from a file opened in input or binary mode |
Instancing Property | Defines how instances of a class are created; specify instancing in the class constructor instead |
InStrB Function | Returns the position of a particular byte in a binary string |
IsEmpty Function | Determines if a variable has been initialized; replaced by the IsNothing function |
IsMissing Function | Determines whether an argument has been passed to a procedure |
Isnull Function | Indicates whether an expression contains Null data; replaced by the IsDbNull function |
IsObject Function | Indicates whether a variable contains a reference to an object; replaced by the IsReference function |
LeftB, LeftB$ Functions | Returns the leftmost specified number of bytes of binary data |
LenB Function | Returns the actual size of a user-defined type in memory |
Let Statement | Assigns the value of an expression to a variable; simply assign values without the Let keyword |
Line Input # Statement | Retrieves a single line from an input file into a variable; replaced by the LineInput function |
Line Method | Draws lines or boxes on a form, PictureBox control, or other drawing surface; replaced by features in the System.Drawing namespace |
Load Statement | Loads a form or control into memory for use |
LoadResData Function | Extracts a string containing a resource included in a resource project; in Visual Basic 2005, use the My.Resources object |
LoadResPicture Function | Assigns a graphic from a resource file to the Picture property of an object; in Visual Basic 2005, use the My.Resources object |
LoadResString Function | Retrieves a string from a resource file; in Visual Basic 2005, use the My.Resources object |
MidB, MidB$ Functions | Returns a specified number of bytes from a larger binary string |
MidB Statement | Replaces a specified number of bytes in a binary string |
MTSTransactionMode Property | Indicates whether a component is an MTS object and, if so, determines its level of transaction support |
Name Statement | Renames a disk file or directory; replaced by the Rename function |
Null Keyword | Indicates a Null data value; use the DBNull class in the System namespace |
ObjPtr Function | Returns a pointer to an object |
On...GoSub Statement | Causes program execution to jump to a block subroutine based on the value of a control variable |
On...Goto Statement | Causes program execution to jump to a label based on the value of a control variable |
Open Statement | Opens a file; replaced by the FileOpen function |
Option Base Statement | Defines the default lower bound for arrays dimensioned within a module; all arrays now have a lower bound of 0 |
Option Private Module Statement | Restricts the scope and visibility of a module to the module's project; use access modifiers in each Module statement |
Persistable Property | Determines whether a class in an ActiveX DLL project can be saved to disk |
Property Statement | Declares procedures for read and write support of class property values; replaced with an updated Property statement syntax |
PSet Method | Draws a colored point on a form, PictureBox control, or other drawing surface; replaced by features in the System.Drawing namespace |
Put Statement | Writes data from a program variable to a disk file; replaced by the FilePut function |
RightB, RightB$ Functions | Returns the rightmost bytes from a binary string |
Scale Method | Defines a custom coordinate system on a form, PictureBox control, or other drawing surface; replaced by features in the System.Drawing namespace |
Set Statement | Assigns an object reference to a variable; simply assign objects without the Set keyword |
Sgn Function | Determines the sign of a number; replaced by the Sign method in the System.Math class |
Sqr Function | Calculates the square root of a number; replaced by the Sqrt method in the System.Math class |
String Function | Creates a string composed of a single character repeated a given number of times; replaced by special constructors on the String data type |
StrPtr Function | Returns a pointer to a BSTR (Visual Basic string) |
Terminate Event | Fires when an object is destroyed; use the Dispose and Finalize methods of a class instead |
Time Function | Returns the current system time; replaced by the DateTime.TimeOfDay property |
Time Statement | Sets the current system time; replaced by the DateTime.TimeOfDay property |
Type Statement | Defines a user-defined type; replaced by the Structure statement (or even the Class statement) |
Unload Statement | Removes a form or a dynamically created member of a control array from memory |
Variant Data Type | Generic data type; use the Object or other relevant data type instead |
VarPtr Function | Returns a pointer to a variable |
Wend Keyword | Terminates a While loop block; replaced by the End While keyword pair |
Width# Statement | Specifies a virtual file width when working with files opened with the Open statement |
