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<hr><p align="left"><small>发信人: Zeemon (塞下秋), 信区: Visual <br>
标 题: Delphi3(4) <br>
发信站: BBS 水木清华站 (Tue Nov 11 19:57:22 1997) <br>
<br>
下文由idol (沉默的人)在浙大BBS西子浣纱城站发表 <br>
<br>
六、C++BUILDER TRIAL <br>
<br>
The Delphi CD includes a trial edition of C++Builder, Borland's <br>
rapid application development tool for C++ programming. To <br>
install the trial version of C++Builder, run SETUP.EXE in the <br>
\TRIALS\CBUILDER\SETUP directory of the Delphi CD. <br>
<br>
For more information about C++Builder, see <br>
http://www.borland.com/bcppbuilder/ <br>
<br>
<br>
七、DOCUMENTATION UPDATES <br>
<br>
VCL documentation and online Help <br>
--------------------------------- <br>
The VCL reference material in the online Help is more up to date <br>
than the printed version. The following methods are documented <br>
only online: <br>
<br>
TApplication.NormalizeAllTopMosts <br>
TCustomForm.WantChildKey (overridden in TActiveForm) <br>
TOleContainer.SaveAsDocument <br>
<br>
The correct syntax for the TApplication.MessageBox method is <br>
in the online Help. Help entries for the TTable, TImage, and <br>
TBDEDataSet objects, among others, have also been revised. <br>
<br>
Due to limitations in the WinHelp compiler, Windows API Help <br>
topics do not appear in the Delphi Help index. However, these <br>
topics are available from the Delphi IDE's context-sensitive <br>
Help system; if you select a Windows API function in the Code <br>
editor and press F1, the appropriate Windows Help topic will <br>
appear. To see an index of Windows API Help topics, access <br>
the Windows API Help directly. The easiest way to do this is <br>
to add a button to the speedbar: Right-click on the <br>
speedbar and select Properties to open the Speedbar editor; <br>
select Help from the Categories list and drag the <br>
Windows API Help icon from the Commands list to your <br>
speedbar; then close the Speedbar editor. <br>
speedbar; then close the Speedbar editor. <br>
<br>
Components on the Win 3.1 palette page are not linked to the <br>
context-sensitive online Help system. For documentation on <br>
these legacy components, refer to the DELPHI.HLP file located <br>
in \Delphi16\Runimage\Delphi\Bin on your Delphi CD. <br>
<br>
Two components on the ActiveX palette page are not linked to <br>
the context-sensitive online Help system. For documentation <br>
on the VtChart control, see Delphi 3\OCX\Vci\Impress\Vcfi.hlp. <br>
For documentation on the Graph Custom Control, see <br>
Delphi 3\OCX\Pinnacle\Graph.hlp. <br>
<br>
The SQL Monitor is not linked to the context-sensitive online <br>
Help. For documentation on this feature, go to the SQL Monitor <br>
topic in the Help index. <br>
<br>
Some database example programs contain hard-coded directory <br>
paths. To make these examples compile, you may need to change <br>
the directory paths. <br>
<br>
COMCTL32 <br>
-------- <br>
-------- <br>
Several of the components on the Win32 palette page function <br>
best with the latest version (4.70) of COMCTL32.DLL. TCoolBar <br>
and TDateTimePicker will not work at all unless version 4.70 <br>
or later is installed. In addition, the following properties <br>
require version 4.70: <br>
<br>
TToolBar.DisabledImages <br>
TToolBar.Flat <br>
TToolBar.HotImages <br>
TToolBar.Images <br>
<br>
TTabControl.HotTrack <br>
TTabControl.ScrollOpposite <br>
TTabControl.TabPosition <br>
<br>
TPageControl.HotTrack <br>
TPageControl.ScrollOpposite <br>
TPageControl.TabPosition <br>
<br>
TListView.Checkboxes <br>
TListView.HotTrack <br>
TListView.GridLines <br>
TListView.RowSelect <br>
TListItem.Checked <br>
<br>
The Min, Max, and Position properties of TProgressBar must <br>
fall within the range of 0 - 65535 if the installed version <br>
of COMCTL32.DLL is less than 4.70. <br>
<br>
TCookie and TCookieCollection <br>
----------------------------- <br>
The HTTPApp unit contains two new classes, TCookie and <br>
TCookieCollection, that descend from TCollectionItem and <br>
TCollection, respectively. TCookie represents a cookie <br>
sent with an HTTP response; it has properties that correspond <br>
to fields of the cookie. (See the cookie documentation available <br>
from Netscape's Web site.) The Cookies property of TCGIResponse <br>
or TISAPIResponse is the name of the TCookieCollection that <br>
contains the TCookie objects. <br>
<br>
TToolBar.Wrapable and TToolButton.Wrap <br>
-------------------------------------- <br>
The Wrapable property of TToolBar enables automatic line-wrapping <br>
for controls on the tool bar. The TToolButton.Wrap property, used <br>
Wrap property, used <br>
to force a line break, is disabled when TToolBar.Wrapable is True. <br>
<br>
TSpeedButton <br>
------------ <br>
To create a speed button with a client-aligned glyph that <br>
covers the button's edges, add a 1-pixel border around the <br>
button's top and left edges and a 3-pixel border around its <br>
bottom and right edges. <br>
<br>
OpenDatabase and CloseDatabase <br>
------------------------------ <br>
TDBDataSet surfaces two methods, OpenDatabase and CloseDatabase, <br>
that open and close the database specified by DatabaseName. These <br>
methods are inherited from TDataSet, where they are protected. <br>
<br>
Check Constraint Objects <br>
------------------------ <br>
The TCheckConstraint and TCheckConstraints objects represent <br>
record-level constraints, not field-level constraints (as stated <br>
in the Help). <br>
<br>
UpdateMode <br>
UpdateMode <br>
---------- <br>
TQueryTable and TTable surface the UpdateMode property, which <br>
is protected in TDBDataSet. UpdateMode determines how the BDE <br>
finds records being updated in an SQL database. It can take the <br>
value upWhereAll (the default), upWhereChanged, or UpWhereOnly: <br>
<br>
upWhereAll = All columns are used to find the record. <br>
upWhereChanged = Only the key columns are used to find the <br>
record. <br>
UpWhereOnly = Only key columns and columns that have changed <br>
are used to find the record. <br>
<br>
TimeOut (TWinSocketStream) <br>
-------------------------- <br>
TWinSocketStream has a TimeOut property that indicates how long, <br>
in milliseconds, the socket should attempt a read or write <br>
operation before timing out. (Hence these operations need not <br>
time out after 20 seconds, as documented.) The initial value for <br>
TimeOut is passed to the constructor as a second parameter, but <br>
it can be changed later. <br>
<br>
-- <br>
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