A vendor has developed an ActiveX control in Microsoft C++. The ActiveX worked fine when they were using the 16bit version of the compiler. The control does not work when compiled using the 32bit version within the Delphi2007/D7 environments. If you drop a control on a form and run it throws an "Floating Point Error". It is a Delphi ...
The System.pas file contains a fair amount of information on hard-coded VMT offsets, but it doesn't seem to actually say much about the structure of the VMT itself. What I'd really like to know is, is there any way to find out the size of a VMT at runtime, or in other words, how many virtual methods exist for a given class? ...
For some reason, transparent controls on a form turn opaque on some computers. I got reports of it happening on an "Acer Netbook" and a "Thinkpad x600". The application is built with Delphi 2007. This is what it looks like: link While it should look like this: link The opaque controls on the form are TLabels and TStaticTexts. (I use...
I need Delphi code or component for accessing exchange/outlook contacts and appointments? I probably need to use Extended MAPI. This is for a proof of concept so I'm not ready to shell out big bucks at the moment. Any hints, links, experiences?? ...
I'm using Delphi 2006 and Indy 10. I create a form and drop down an IdHttpServer component. I make an OnCreate event for the form to set the server active, and I enter these lines for the server's OnCommandGet: procedure TForm3.IdHTTPServerCommandGet(AContext: TIdContext; ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPRespo...
I was wanting to create a small tool in Delphi which can update the Delphi version information in another exe file. I know several existing utilities are out there for this but I need full programmatic control and would prefer no shelling out to the command line, etc. After a web search I couldn't find any Delphi source code examples o...
In building components for installation, I know that registration units are generally a "should be separate" thing, but what are the guidelines for when one should divide the component installation into two separate packages (typically one being runtime, and the other being design time). Bonus question: What are the accepted package nam...
In my Delphi application I have a custom Yes, No, Cancel dialogue, which will be called from the main form to confirm saving the changes made to the current file edited. This would normally be achieved by messageDlg() but I wanted this dialogue to have customised looks, so I am trying to achieve this functionality by case myDialogue.sh...
I still haven't found a truly satisfactory answer to this question, and am now considering rolling my own. I have ModelMaker and GExperts, and neither seems to load the comprehensive class-hierarchy I am looking for. As well, I don't think the folks at DevExpress will fork over the CDK code which compiles a full class list to inherit f...
Personally I like it if my uses clauses are as small as possible, but in many applications the really big units (in terms of bloating the executable) like Forms or VirtualTrees are needed in at least another unit anyway. So: Does it make a difference if I clean my uses clauses even if in the end no unit is removed from the project? If s...
The last release of Graphics32 1.8.3 is dated with March 2007. When will there be an official Delphi 2010 compatible version? Is there any public SCM repository of Graphics32? ...
I'm trying to build 3 packages, A, B and C. A defines some base classes that are used in B and C. I've got all 3 of them in the same project group, all set up to output to the same custom BPL output folder. This folder is in the search path for B and C. But when I go to build B and C, the compiler chokes on the Requires list. "Requir...
Given the desire to use the useful Region compiler directive in unit files, what's the best approach to allow these same units from being used in previous versions of Delphi? There doesn't seem to be a 'decent' approach. (Desired IDE version is Delphi 7) I like having Regions above the method definitions to hide/display the method defi...
There is a post by Raymond Chen, where he tells how bad IsBadXxxPtr function is by eating guard page exception. I don't quite understand how it is applied to Delphi. Who and how should normally (i.e. without call to IsBadXxxPtr) process this exception? I do know that Delphi inserts a code, which (for example) access a memory for large ...
I am in the process of writing (down) our companies coding standards for Delphi programming, so what would anyone suggest to have as a basis, anything that you would recommend to use / not use ? ...
Hi All I would greatly appreciate some help on anyone that has experience in working with Rich Edit controls in Delphi that support Regular Expression searches. I've toyed around with RichEdit.dll V3 based controls only to find that MS's ITextSelection.FindText implementation uses some MS Mickey Mouse variant of regular expressions (i....
I have a simple COM dll with a method that takes two strings. In the type library editor of delphi these strings are defined as LPSTR. This translates to PChar in the TLB file. When upgrading from D2007 to D2009 this became a problem since PChar now has changed from PAnsiChar to PWideChar (it still becomes PChar in the TLB file when it i...
Hi, If I run a program and an exception is raised I am asked if I want to continue or break. If I choose break I can see where the exception is coming from but if the break is in a library or system file not one of my source files (Say the exception is in System.pas or Controls.pas) I need to manuall step the execution forward using F8...
I have seen that most of the components (VCLs) in Delphi are split in two parts. 1) DesignTime Package 2) RunTime Package Why all this fuss. What difference does it make if both RunTime and DesignTime packages are united into one single Package? I have never really been able to understand this separation logic. So what is the logic be...
Hi all, assume a data structure Person used for a contact database. The fields of the structure should be configurable, so that users can add user defined fields to the structure and even change existing fields. So basically there should be a configuration file like FieldNo FieldName DataType DefaultValue 0 ...