Questions tagged [delphi]
Delphi is a language for rapid development of native Windows, macOS, Linux, iOS, and Android applications through use of Object Pascal. The name refers to the Delphi language as well as its libraries, compiler and IDE which is used to help edit and debug Delphi projects.
delphi
51,845
questions
270
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How to affect Delphi XEx code generation for Android/ARM targets?
Update 2017-05-17. I no longer work for the company where this question originated, and do not have access to Delphi XEx. While I was there, the problem was solved by migrating to mixed FPC+GCC (...
- 3,015
193
votes
9
answers
393k
views
Indentation shortcuts in Visual Studio
I'm using Visual Studio 2010 and C#. How can I indent the selected text to left/right by using shortcuts?
In the Delphi IDE the equivalents are Ctrl+Shift+I and Ctrl+Shift+U
- 12.5k
179
votes
20
answers
435k
views
The application was unable to start correctly (0xc000007b)
I have a client/server app which I have been developing on a single PC. Now it needs two serial ports, so I borrowed a PC from a friend.
When I build my app and try to run or debug it (whether in the ...
178
votes
2
answers
3k
views
Delphi XE custom build target is always disabled
I've created a custom MSBuild .targets file that I've included in a Delphi XE project via the IDE and enabled it from the Project Manager's context menu. Although the file validates, it always gets ...
- 1,899
153
votes
1
answer
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SOAP server and client application VCL+indy demo for Delphi XE?
Delphi used to include a demos folder for web Services, but no longer seems to include this.
I just tried the Delphi 7 demo projects (SOAPDMServerWAD, a server with almost no UI at all, and ...
- 67.2k
147
votes
2
answers
8k
views
How to create "No Activate" form in Firemonkey
In XCode by adding these methods to your NSView subclass can prevent the window from becoming active when clicking on it:
- (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent )theEvent {
return YES;...
- 3,556
146
votes
8
answers
11k
views
EProgrammerNotFound exception in Delphi?
In Delphi 2009, SysUtils.pas contains this in line 425:
EProgrammerNotFound = class(Exception);
Is this simply an easter egg or something serious?
When should this exception be raised?
Does it also ...
- 36.4k
145
votes
7
answers
44k
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Find out what process registered a global hotkey? (Windows API)
As far as I've been able to find out, Windows doesn't offer an API function to tell what application has registered a global hotkey (via RegisterHotkey). I can only find out that a hotkey is ...
- 7,218
123
votes
3
answers
35k
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List of Delphi language features and version in which they were introduced/deprecated
Before I begin, I would like to point out that I have honestly and genuinely searched repeatedly and exhaustively via Google for such a thing, and been unable to find one.
I require (for a project I'...
- 5,834
115
votes
10
answers
74k
views
Are delphi variables initialized with a value by default?
I'm new to Delphi, and I've been running some tests to see what object variables and stack variables are initialized to by default:
TInstanceVariables = class
fBoolean: boolean; // always starts ...
- 7,445
111
votes
4
answers
56k
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How do I make my GUI behave well when Windows font scaling is greater than 100%
When choosing large font sizes in the Windows control panel (like 125%, or 150%) then there are problems in a VCL application, every time something has been set pixelwise.
Take the TStatusBar.Panel. ...
- 15.1k
109
votes
12
answers
202k
views
How do I include a newline character in a string in Delphi?
I want to create a string that spans multiple lines to assign to a Label Caption property. How is this done in Delphi?
- 19k
106
votes
2
answers
2k
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How do you extract local variable information (address and type) from a Delphi program or the compiler-generated debug info?
My goal is:
Given a suspended thread in a Delphi-compiled 32 or 64-bit Windows program, to walk the stack (doable)
Given stack entries, to enumerate the local variables in each method and their ...
- 13.5k
104
votes
1
answer
3k
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Is there a way to programmatically tell if particular block of memory was not freed by FastMM?
I am trying to detect if a block of memory was not freed. Of course, the manager tells me that by dialog box or log file, but what if I would like to store results in a database? For example I would ...
- 6,932
99
votes
1
answer
2k
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Required tags not present when using Delphi XML Data Binding Wizard
I am using the XML Data Binding Wizard in Delphi XE2.
The schema has required tags of this type:
<xs:element name="MyReport" type="MyReportType" />
<xs:complexType name="MyReportType">
&...
- 1,125
93
votes
21
answers
328k
views
Split a string into an array of strings based on a delimiter
I'm trying to find a Delphi function that will split an input string into an array of strings based on a delimiter. I've found a lot from searching the web, but all seem to have their own issues and I ...
- 7,815
86
votes
2
answers
3k
views
Is the compiler treatment of implicit interface variables documented?
I asked a similar question about implicit interface variables not so long ago.
The source of this question was a bug in my code due to me not being aware of the existence of an implicit interface ...
- 607k
75
votes
9
answers
8k
views
Why is it bad practice to call an eventhandler from code?
Say you have a menu item and a button that do the same task.
Why is it bad practice to put the code for the task into one control's action event and then make a call to that event from the other ...
- 1,370
73
votes
2
answers
2k
views
Webview not displaying in MacOS using Delphi XE2
I have started to convert the Webview interfaces to be consumed in Delphi. I have managed to get the webkit library to load, and the interface methods that is called appears to work correctly, ...
- 1,029
68
votes
1
answer
786
views
Delphi XE6 link C code in iOS
I've built an App on Android using Delphi XE6 that requires C code. However on iOS I cannot make it work. I suspect the problem is related to arm/thumb status, but I am not sure. There is no problem ...
67
votes
1
answer
2k
views
BcdDivide function behave differently in Delphi XE and XE2
FmtBcd.pas has been extensively revised rewritten in Delphi XE2. In one of my projects, I have a case that uses a division operation on two Bcd values, but the two versions yield different results. In ...
- 19.1k
65
votes
5
answers
8k
views
How Do I Choose Between the Various Ways to do Threading in Delphi?
It seems that I've finally got to implement some sort of threading into my Delphi 2009 program. If there were only one way to do it, I'd be off and running. But I see several possibilities.
Can ...
- 20.1k
64
votes
5
answers
121k
views
Selecting a directory with TOpenDialog
I'd really like to know the various ways I could select a directory with the TOpenDialog, whether it be downloading a new component or using what is provided by Delphi, but preferably using what is ...
- 2,110
64
votes
1
answer
2k
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Live Binding with Automatic updates in XE3 (no need to call Notify() as in XE2)
I am currently using Delphi XE2, and heard about their new Live Binding with Automatic updates in XE3 (no need to call Notify() as in XE2).
in C# or in Delphi XE2 we have to implement ...
- 7,187
63
votes
9
answers
11k
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How should I prepare my 32-bit Delphi programs for an eventual 64-bit compiler? [duplicate]
Possible Duplicate:
How to also prepare for 64-bits when migrating to Delphi 2010 and Unicode
Since I believe that 64bit Delphi compiler will appear soon,
I am curious if anybody knows what kind ...
- 813
62
votes
17
answers
13k
views
Accidentally created a virus?
I've seen it happen reasonably often: I write an application in Delphi and when I compile it, the virus-scanner tells me that I've created a virus and then immediately deletes the executable again. It'...
- 26.2k
62
votes
6
answers
93k
views
Delphi: StringList Delimiter is always a space character even if Delimiter is set
I am having trouble with the delimiter in the TStringList Class. Take a look:
var
s: string;
sl: TStringList;
begin
sl := TStringList.Create;
s := 'Users^foo bar^bar foo^foobar^barfoo';
sl....
- 1,388
60
votes
8
answers
6k
views
Studies of relative costs for development in different languages
Has anyone seen a recent (and fairly balanced) study into the relative costs for software development using differing languages ? I would particular like to see the relative costs of Java Vs. C# Vs. ...
- 2,441
60
votes
9
answers
29k
views
Unit testing in Delphi - how are you doing it? [closed]
I'm wondering how the few Delphi Programming users here are doing unit testing, if any? Is there anything that integrates with the Delphi IDE that you've found works well? If not, what tools are you ...
- 1,634
60
votes
4
answers
26k
views
What's the difference between "var" and "out" parameters?
What's the difference between parameters declared with var and those declared with out? How does the compiler treat them differently (e.g., by generating different code, or by changing which ...
- 162k
59
votes
5
answers
34k
views
Why should I not use "if Assigned()" before accessing objects?
This question is a continuance of a particular comment from people on stackoverflow which I've seen a few different times now. I, along with the developer who taught me Delphi, in order to keep things ...
- 27.1k
58
votes
4
answers
61k
views
How do I make Beyond Compare ignore certain differences while comparing versions of Delphi Form Files
I use Beyond Compare (version 3.1.10) to compare different versions of Delphi Form Files, but I don't want to see differences concerning ExplicitTop, ExplicitLeft, ExplicitHeight and ExplicitWidth.
...
- 5,668
58
votes
4
answers
2k
views
Remote debugging with XE2 - display of strings
I'm remote debugging a large app between DElphi XE2 (update #4) and a Windows XP target. PAServer is running on the target and the application works fine and stops at breakpoints (you would NOT ...
- 13.3k
56
votes
10
answers
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views
Delphi 2006-2010 error: "Cannot create file C:\Users\Admin\AppData\Local\Temp\EditorLineEnds.ttr"
I am getting an error after installing Delphi 2007 (Edit: This problem occurs in all Delphi versions from 2006 to 2010) that I can not figure out and have never seen before. After restarting I can ...
- 6,334
55
votes
3
answers
71k
views
What's the difference between Refresh, Update and Repaint?
I don't know which of those three methods suits me most. They all work for me. Does anyone know the difference between Refresh, Update and Repaint?
- 35k
54
votes
12
answers
30k
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Profiler and Memory Analysis Tools for Delphi [closed]
I recently upgraded from Delphi 4 to Delphi 2009. With Delphi 4 I had been using GpProfile by Primoz Gabrijelcic as a profiler and Memory Sleuth by Turbo Power for memory analysis and leak debugging. ...
54
votes
2
answers
7k
views
Is COM broken in XE2, and how might I work around it?
Update: XE2 Update 2 fixes the bug described below.
The program below, cutdown from the real program, fails with an exception in XE2. This is a regression from 2010. I don't have XE to test on but I'...
- 607k
54
votes
4
answers
1k
views
Midi Timing Issues with Delphi ASIO VST and MiniHost
I'm coming from a background of using MSC* MidiSequencer for a Delphi XE2 project and have been playing with DelphiASIOVST this weekend on the off chance the MIDI may be stable enough to use as my ...
53
votes
6
answers
41k
views
How to get the Memory Used by a Delphi Program
I know how to get the System memory use using GlobalMemoryStatusEx, but that tells me the what the entire OS is using.
I really want my program to report how much memory it alone has allocated and is ...
- 20.1k
53
votes
1
answer
7k
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How to make TRichEdit behave like WordPad on Windows 7 when changing font for certain non-text characters?
With the help of Sertac Akyuz, it seems the direct reason is related to the charset of \bullet: In my localized Windows, the \bullet input by typing Alt(0149) always gets \fcharset134, and attempts to ...
- 3,832
52
votes
5
answers
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views
Which is preferable: Free or FreeAndNil?
What is the basic difference between Free and FreeAndNil?
Is FreeAndNil = Free + Nil?
When should I use Free and when should I use FreeAndNil?
- 6,838
52
votes
3
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Delphi: What is Application.Handle?
What is TApplication.Handle?
Where does it come from?
Why does it exist?
And most importantly: why do all forms have it as their parent window handle?
The Delphi help says:
TApplication.Handle
...
- 251k
51
votes
5
answers
18k
views
Identifiers for Delphi's $WARN compiler directive
Delphi has a $WARN compiler directive that allows one to selectively enable or disable specific warnings. The Delphi 2009 help file describes the syntax:
{$WARN identifier ON|OFF}
But it only lists ...
- 21.7k
51
votes
0
answers
2k
views
How do I write a TDBCtrlGrid VCL Style custom class?
There are lots of questions here about XE2 VCL Styles and custom colors for Buttons, Panels, edits, etc, and VCL Styles. As much as I wish the existing questions covered it, they don't... So DB ...
- 67.2k
49
votes
13
answers
98k
views
Standard URL encode function?
Is there a Delphi equivalent of this .net's method:
Url.UrlEncode()
Note
I haven't worked with Delphi for several years now.
As I read through the answers I notice that there are several remarks and ...
- 92k
49
votes
4
answers
110k
views
Create a constant array of strings
Is there a way in Delphi declaring an array of strings such as following one?
{'first','second','third'}
- 4,769
49
votes
4
answers
13k
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Best way to do non-flickering, segmented graphics updates in Delphi?
I thought I could just throw this out there and just ask: I have seen Delphi controls that are flawless in terms of graphical effects. Meaning: no flickering, sectioned updates (only redraw the ...
- 3,970
49
votes
2
answers
11k
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Why can a WideString not be used as a function return value for interop?
I have, on more than one occasion, advised people to use a return value of type WideString for interop purposes.
Accessing Delphi DLL throwing ocasional exception
ASP.NET web app calling Delphi DLL ...
- 607k
48
votes
12
answers
50k
views
Why would a Delphi programmer use Lazarus as the IDE instead of using Delphi's IDE? [closed]
I've been very happy with the Delphi IDE for programming in Delphi.
But I've heard about the Lazarus programming environment, and I've also heard that some Delphi programmers use it instead of the ...
- 20.1k
48
votes
3
answers
21k
views
Is it possible to define {$IFDEF} for more than one directive at once?
Is it possible to define more than one conditional in one {$IFDEF} directive ?
I would like to have syntax like this:
{$IFDEF Condition1 OR Condition2} DoSomething; {$ENDIF}
{$IFDEF Condition1 AND ...
- 2,177