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Microsoft KB Archive/100492

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README.TXT for Standard Edition of VB ver 3.0 for Windows

Article ID: 100492

Article Last Modified on 1/8/2003


  • Microsoft Visual Basic 3.0 Professional Edition

This article was previously published under Q100492


The following article contains the complete contents of the README.TXT file distributed with Microsoft Standard Edition of Visual Basic version 3.0 for Windows.



      Release Notes for Microsoft (R) Visual Basic (TM) Standard Edition

                                Version 3.00

                  (C) Copyright Microsoft Corporation, 1993

This document contains release notes for Microsoft Visual Basic Standard
Edition version 3.0 for Windows. Information in this document is more
current than that in the manuals or online Help.

How to Use This Document

To view README.TXT on screen in Windows Notepad, maximize the Notepad

To print README.TXT, open it in Windows Write, Microsoft Word, or another
word processor. Then select the entire document and format the text in
10-point Courier before printing.

     Read Part 1 - Software Installation Information - before installing.


Part    Description
----    -----------
 1      Software Installation Information
 2      Notes and Tips
 3      Notes for "Learning Microsoft Visual Basic" Tutorial
 4      Notes for Microsoft Visual Basic Online Help
 5      Notes for Microsoft Visual Basic "Programmer's Guide"
 6      Notes for Microsoft Visual Basic "Language Reference"

Part 1: Software Installation Information

To install Visual Basic, use the Program Manager or File Manager to start
SETUP.EXE as you would any other Windows-based application. For example,
if you are installing from drive A:

- From the Program Manager File menu, choose Run.

- In the Run dialog box, type A:SETUP and choose OK.


- From the File Manager, double-click the SETUP.EXE file icon
  on drive A.

File Sharing for OLE and Data Access

You will need SHARE.EXE to enforce file and byte range locking if the
following programs are running simultaneously:

- Two Visual Basic applications that perform data access
- Two instances of one Visual Basic application that performs data access
- Microsoft Access and a Visual Basic application that performs data

If you are running Microsoft Windows 3.0 or Windows 3.1 (i.e. not
Windows for Workgroups), you will need to change your AUTOEXEC.BAT
as follows:

     SHARE /L:500 /F:5100

If the /L or the /F setting to SHARE has a larger value than listed here,
leave the setting as it is rather than reducing it.

Please make this change as soon as possible in your system.

If you ship .EXE files to users that use OLE or data access, they must
add this setting to their AUTOEXEC.BAT file as well.

Visual C++ and GRID.VBX

If you plan to install Microsoft Visual C++(TM) Development System for
Windows on your system, you may overwrite the grid control in your Windows
\SYSTEM directory. Before installing Visual C++, make a backup of GRID.VBX.
If you have already installed Visual C++, you can re-install GRID.VBX by
running Setup again, choosing the Custom Installation button, and then
selecting the Microsoft Visual Basic option.

Part 2: Notes and Tips
Data Access Compatibility - Visual Basic 2.0 and 3.0

The new functionality of the Microsoft Access engine in Visual Basic 3.0
will affect the behavior of your VB 2.0 code. Visual Basic 3.0 will
now assume that all SQL statements take the form of Access SQL (see the
Access documentation). You can passthrough SQL to ODBC; as a second
parameter to the CreateDynaset method, you must specify &H40 to indicate
SQL passthrough. Note that if you used backend-specific SQL with
CreateDynaset, you must add this parameter.

ATI Driver

If you have an ATI Wonder card, moving the data control around at design
time may cause a GP fault. Contact ATI for more information.

BackColor Displayed Incorrectly with 256-Color Bitmaps

If you have a 256-color bitmap in any control (or the form) that has a
BackColor property, it is possible that the background color of that object
will not display correctly if no color in the bitmap's palette matches the
background color.

"Communication Link Failure" Error

If you receive a "Communication Link Failure" error when executing queries
against a Microsoft or Sybase SQL Server, you can retry the operation with
asynchronous execution disabled. To do this, add the following entry to
your VB.INI file:


Visual Basic will continue to run synchronously until this line is removed
from VB.INI.

OLE Class Names

To get a reference to a currently running OLE application by using its
class name, you must use:

      GetObject(, "classname")

that is, GetObject has to have an empty file name. A file name of "" will
create a new instance of the server for class name. This is contradictory
to what is documented.

OLE Control: In-Place Activation

The Visual Basic OLE 2.0 control supports "Inside-Out Activation," which
corresponds to "activation on GetFocus." If a server designates this
capability and you specify AutoActivate = GETFOCUS, then:

- The object is initially deactivated the first time the control gets the

- The object is not fully deactivated when the control loses focus.
  Instead, the object is directed to tear down any floating user interface
  it may have, such as tool pallettes.

Note that AutoActivate = GETFOCUS is only supported if the server claims to
be "inside-out-capable," further reducing the possibility of looping
re-activation when a non-insitu server closes and gives focus back to the

OLE Control: Pasting Objects from the Clipboard

Applications that provide objects behave differently when an object is
deleted. When you delete an OLE object (set Action = 10), the object's
application may or not close. If the application does close, any objects on
the Clipboard associated with that application may also be closed. Because
of this, you may not be able to cut an object (copy, then delete), since
deleting the object may also cause the data on the Clipboard to be deleted.

Another instance of this behavior is when you try to copy an object, then
paste the object back onto itself. This action may cause an error, because
in order to paste over an existing object, the existing object is first
deleted. If the application associated with the object closes, and
subsequently deletes any objects it has on the Clipboard, the Clipboard no
longer contains an object to paste.

OLE Control: The PasteOK Property

The following applies to objects on the Clipboard that come from an OLE

- When PasteOK returns True, there is no guarantee that the Paste operation
  will succeed. For example, PasteOK returns True and the Paste fails when
  there is a linked object on the Clipboard and you are pasting into an
  object whose OleTypeAllowed property is set to 1 (Embedded).

- PasteOK returns False when there is a linked object on the Clipboard and
  you are pasting into an object whose OleTypeAllowed property is set to
  0 (Linked).

OLE Control: Link Target

You cannot activate a linked object as hidden (set Verb = -3). You can,
however, activate an embedded object as hidden.


OLE has also defined two new standard verbs relating to the two states that
an in-place-active object can have. The following corresponding constants
have been added to CONSTANT.TXT:

Constant                  Description
--------                  -----------
VERB_INPLACEUIACTIVATE    Object fully in-place active, including floating
                          UI. Only one at a time per top-level form can be
                          in this state.

VERB_INPLACEACTIVATE      Object is semi-active; it is running and ready to
                          respond to user input like clicking within the
                          object or changing the mouse pointer as the user
                          moves the mouse over different parts of the
                          object. Any number of objects can be in this
                          state at a time.

So, if you have a number of inside-out-capable objects on a form, where the
user has specified AutoActivate = ONGETFOCUS, the objects take turns at
being in-place-UI-Active. The new verbs allow the Visual Basic programmer
to cause these objects to be in the in-place-active state. For example, if
you want to create a form with several of these objects, and you want the
form to be as responsive as possible to user input, you would put the
following code for each control into your Form_Load event handler:

     OLEControl.Action = OLE_ACTIVATE

See the file CONSTANT.TXT for more information.

Windows 3.0 and the PopupMenu Method

Under Windows 3.0, pop-up menus invoked during a MouseDown event in some
cases do not recognize menu selections made with the mouse. If that occurs,
you can still make a selection using the arrow keys and the Enter key.

Saving ASCII Forms in Source Code Managers

When using source code managers, you need to change the read-only bit on
the binary file (.FRX) as well as the form file (.FRM) to save the form.

Part 3: Notes for "Learning Microsoft Visual Basic" Tutorial
Save Project Before Run

The Save Project Before Run Environment Option (under the Options menu)
should be set to "No" when running the "Learning Visual Basic" tutorial.
Some of the lessons may be impaired if this option is set to "Yes."  By
default, this setting is "No."

Part 4: Notes for Microsoft Visual Basic Online Help
Error Message Help

Online Help is not available for dialogs or error messages that occur at
design time. For ISAM errors, use the Search dialog in Help.

"Couldn't find installable ISAM"

An external file dynamic link library (DLL) file couldn't be found. This
file is required for operations such as attaching or accessing external

Possible causes:

1) An entry in the [Installable ISAM] section in VB.INI or <APPNAME>.INI is
   incorrect. For example, this error occurs if you're accessing a Paradox
   external table, and the Paradox entry of the .INI file points to a
   nonexistent directory. Exit Visual Basic, make necessary corrections in
   VB.INI or <APPNAME>.INI using Microsoft Windows Notepad or another text
   editor, restart Visual Basic, and try the operation again.

2) One of the entries in the [Installable ISAM] section in VB.INI points to
   a network drive, and that drive isn't connected. Check to make sure the
   network is available and the proper drive letter is established, and try
   the operation again.

Part 5: Notes for Microsoft Visual Basic "Programmer's Guide"

Page   Section/Note
----   ------------
188    The New Keyword

       In the example at the top of the page, the local form
       variable F is declared with the New keyword using the
       Dim statement. To make the form variable and the
       loaded form instance persist, use a Static or Global
       variable instead.

194    Determining the Type of an Object Variable

       You can use the If...TypeOf statement to determine the
       control type of a custom control:

          If TypeOf object Is objecttype

       The identifier you use for 'object' is the class name of
       the custom control. See the section "Specific Control
       Object Types" (p. 186) for more information.

461    The Options Property

       The constant values shown are in hexidecimal and should be
       preceded with the &H notation. For example,
       DB_SQLPASSTHROUGH = &H40, not decimal 40. See online Help
       (Options Property) or the file DATACONS.TXT for the correct

462    The RecordSource Property

       The following text and example should be changed:

       For example, the following SQL query returns all of the columns
       in the bibliography for authors who live in New York:

       Data1.DatabaseName = "BIBLIO.MDB"
       Data1.RecordSource = "Select * from Titles where state = 'NY'"

       The above should read:

       For example, the following SQL query returns all of the columns
       in the bibliography for publishers based in New York:

       Data1.DatabaseName = "BIBLIO.MDB"
       Data1.RecordSource = "Select * from Publishers where state = 'NY'"

465    Adding a New Record

       In the second paragraph in this section, the last sentence
       should read, "Notice that using the buttons on the data
       control or one of the Move methods to move to another record
       will automatically save your added record."

530    Determining How an Object Is Displayed

       In the first paragraph, the second sentence should read,
       "the Icon check box," not "th eIcon check box."

550    Creating Invisible Objects

       In the sample code, the following line has incorrect syntax:

       MyWord = ObjVar.SuggestWord MyWord

       The code should look like this:

       MyWord = ObjVar.SuggestWord (MyWord)

552    Limitations in Visual Basic

       Under the discussion "Arrays and User-Defined Types," the third
       bulleted item should read: "You cannot...Assign the return value
       of a property or method to an array variable or a variable of a
       user-defined type."

554    Closing an Object

       In the paragraph after the sample code, second sentence:  It is
       not true that invoking a Close method on an object sets variables
       that refer to the object to Nothing.

582    Determining the Files You Need to Distribute

       The following additional files are required for distributing
       your Visual Basic applications:

       DLL Name       Required by (Professional Edition Only)
       --------       ---------------------------------------
       PDIRJET.DLL    Crystal Reports for Visual Basic
       PDBJET.DLL     Crystal Reports for Visual Basic
       MSAJT110.DLL   Crystal Reports for Visual Basic
       MSAES110.DLL   Crystal Reports for Visual Basic
       PDSODBC.DLL    ODBC and Crystal Reports for Visual Basic

Part 6: Notes for Microsoft Visual Basic "Language Reference"

Page   Section/Note
----   ------------
21-22  Action Property (OLE)

       In the Settings table, in Setting 5, the reference to None in the
       second sentence of the third paragraph should read as follows:
       "If the Paste was not successful, the OleType property will be set
       to 3 (None)."  In Setting 12, the constant should be
       OLE_READ_FROM_FILE, not ReadFromFile. In Setting 14, the constant
       should be OLE_INSERT_OBJ_DLG.

41     AutoActivate Property

       In the Note, replace the words "the double-click event" with
       "a DblClick event."

53     BorderStyle Property

       The OLE control cannot have a setting of 2. Remove the setting and
       description for Setting 2 in the OLE control table.

65     Check Box Control

       Add DataField and DataSource to the Properties list.

82     Color Property

       The "Applies To" line should read "Common dialog (Color dialog)."

89     Common Dialog Control

       Add "FilterIndex" and "MaxFileSize" to the Properties (File dialogs)

93     Connect Property

       In the Note, change "SourceTable" to "SourceTableName."

97     Copies Property

       The "Applies To" line should read "Common dialog (Print dialog)."

100    CreateDatabase Function

       In the code example, replace "False" with "DBVERSION10."  Also, in
       the table above the code example, replace "DB_COMPACT_ENCRYPT" with

111    Data Control

       Add UpdateControls and UpdateRecord to the Methods list.

112    Database Object

       In the Properties list, the QueryTimeout Property should be
       identified as being available only in the Professional Edition.

117    DataText Property

       In the code example, change the two instances of "MSDRAW" to

134    DefaultExt Property

       The "Applies To" line should read "Common dialog (File dialogs)."

185    Field Object

       The Properties list should refer to SourceField and SourceTable, not
       SourceFieldName and SourceTableName.

195    FileTitle Property

       The "Applies To" line should read "Common dialog (File dialogs)."
       Add the following to the Remarks section:

       Note: If the OFN_NOVALIDATE flag is set, the FileTitle property will
       not return a value.

198    Filter Property (Common Dialog)

       At the beginning of the topic, add "Applies To...Common dialog (File
       dialogs)."  In the Remarks section, after the third paragraph, add
       this text:

       Here is an example of a Filter in which the user can choose text
       files or picture files that include bitmaps and icons:


199    FilterIndex Property

       The "Applies To" line should read "Common dialog (File dialogs)."

229    Frame Control

       Add the Name Property to the Properties list.

231    FromPage, ToPage Properties

       The "Applies To" line should read "Common dialog (Print dialog)."

240    GetAttr Function

       The final Sub...End Sub block in code should read as follows:

       Sub File1_Click ()
         Const ATTR_READONLY = 1, ATTR_HIDDEN = 2   ' Declare constants.
         Const ATTR_SYSTEM = 4, ATTR_ARCHIVE = 32
         Dim Attr, FName, Msg   ' Declare variables.
         If Right(Dir1.Path, 1) = "\" Then      ' See if root file.
            FName = Dir1.Path & File1.FileName  ' Get file path.
            FName = Dir1.Path & "\" & File1.FileName    ' Get file path.
         End If
         Attr = GetAttr(FName)  ' Get attributes.
         If Attr > 7 Then Attr = Attr Xor ATTR_ARCHIVE ' Disregard Archive.
         Select Case Attr       ' Look up attributes.
            Case 0: Msg = "Normal"
            Case ATTR_READONLY: Msg = "Read-Only"
            Case ATTR_HIDDEN: Msg = "Hidden"
            Case ATTR_HIDDEN +  ATTR_READONLY: Msg = "Hidden and Read-Only"
            Case ATTR_SYSTEM: Msg = "System"
            Case ATTR_READONLY +  ATTR_SYSTEM: Msg = "Read-Only and System"
            Case ATTR_HIDDEN +  ATTR_SYSTEM: Msg = "Hidden and System"
                - Msg = "Read-Only," + Msg = " Hidden, and System"
         End Select
         MsgBox UCase(FName) & " is a " & Msg & " file." ' Display message.
       End Sub

256    hDC Property

       The Usage line should read:

            {[form.] [commondialog. | picturebox.] | Printer.}hDC

       Also, the second paragraph of the Remarks should read, "With a
       common dialog control, this property returns a device context for
       the printer selected in the Print dialog box when the..." (the rest
       of the text remains the same).

258    Height, Width Properties

       The See Also line should refer to the "Width # Statement," not the
       "Width Statement."

274    Image Control

       Add DataField and DataSource to the Properties list.

280    InitDir Property

       The "Applies To" line should read "Common dialog (File dialogs)."

297    KeyDown, KeyUp Events

       The See Also should refer to the SendKeys Statement, not the
       SendKeys Method.

299    KeyPress Events

       The See Also should refer to the SendKeys Statement, not the
       SendKeys Method.

303    Label Control

       Add the DataField, DataSource, and Parent properties to the
       Properties list.

336-   ListFields Method
       In the second table, the fifth and sixth entries in the Field column
       should be SourceTable and SourceField, not SourceTableName and
       SourceFieldName. The code example and the headings of the table
       below it should also refer to SourceTable and SourceField.

345    ListTables Method

       In Remarks, the first paragraph under the TableType field table
       should read: "When you use the ListTables method to create a
       Snapshot, you can evaluate the contents of the Attributes field in
       the Snapshot by referring to the TableDef property settings table in
       the Attributes property topic.

361    Max, Min Properties (Common Dialog)

       At the beginning of the topic, add "Applies To...Common dialog
       (Font, Print dialogs)."

363    MaxFileSize Property

       The "Applies To" line should read "Common dialog (File dialogs)."

390    Name Property

       The "Applies To" line should include the Database object.

432    Partition Function

       In the code in Example 3, the second five lines of code duplicate
       the first five lines and should be deleted.

439    Picture Box Control

       Add DataField and DataSource to the Properties list.

444    PopupMenu Method

       In the Syntax line, there should be a comma in front of the y.

455    PrinterDefault Property

       The "Applies To" line should read "Common dialog (Print dialog)."

536-   SourceFieldName, SourceTableName Properties
       All references to SourceFieldName and SourceTableName in this topic
       should refer to "SourceField" and "SourceTable" instead.

538    SourceTableName Property

       There should be a full entry for the "SourceTableName" topic. See
       online Help for the text of this topic.

565    Text Box Control

       The second piece of art is incorrect. It should show a text box
       on a form but instead shows a menu title and menu items on a form.
       Also, add DataField and DataSource to the Properties list.

595    Validate Event

       In the third paragraph following the Constants table, change "edit
       buffer" to "copy buffer."

619    Trappable Errors

       In Appendix B, the odd header is wrong. It should read "Trappable
       Errors," not "Trappable Error Messages."

634    Trappable Error Messages

       In Table B.6 ("Data Access Trappable Error Messages"), Error #3137
       should be deleted.

Additional query words: 3.00 docerr

Keywords: KB100492