delphi-5

Today Recently on Stackoverflow i learned that: reintroduce is used to hide ancestor constructors reintroduce is used to show ancestor constructors i've been trying to make sense of it all, so here is a another, very specific question, supporting my main question dealing with constructors . Update: replaced the entire question: TComputer = class(TObject) public constructor Create(Teapot: string=''); end; TCellPhone = class(TComputer) public constructor Create(Cup: Integer); overload; virtual; constructor Create(Cup: Integer; Teapot: string); overload; virtual; end; When constructing TCellPhone

I am using a Tabbed Listbox component that was written by Fredric Rylander back in 1999 and it has been serving me well since then. :) Can't seem to find him anymore. I now have an application that needs both Tabbed Data and alternating colored lines in the Listbox. I can include the Component here for perusal if desired. I tried coloring the lines from here http://delphi.about.com/cs/adptips2002/a/bltip0602_4.htm But then it eats the Tabs, but I do get the alternating colored lines. Can someone please show me how to incorporate the two. Thanks Here's the Component unit myListBoxTabbed; {

I have added these two methods to the 1st unit of my Delphi 5 application. function Inp(PortAddress: Integer): Integer; stdcall; external 'inpout32.dll' name 'Inp32'; procedure Output(PortAddress, Value: Integer); stdcall; external 'inpout32.dll' name 'Out32'; However I don't want to have to issue the inpout32 library with the software unless they explicitly need it. Currently the program says "Not Found" upon executing unless they're present in the root or System32. Users will only call these methods if they have a specific option set, but this is not gathered from the .ini file until after

Update: The example i originally had was kind of complex. Here's a simple 8 line example that explains everything in one code block. The following does not compile gives a warning: TComputer = class(TObject) public constructor Create(Cup: Integer); virtual; end; TCellPhone = class(TComputer) public constructor Create(Cup: Integer; Teapot: string); virtual; end; Note: This question is part 3 in my ongoing series of questions about the subtlties of constructors in Delphi Original question How can i add a constructor to an existing class? Let's give an hypothetical example (i.e. one that i'm

A co-worker mentioned to me a few months ago that one of our internal Delphi applications seems to be taking up 8 GB of RAM. I told him: That's not possible A 32-bit application only has a 32-bit virtual address space. Even if there was a memory leak, the most memory it could consume is 2 GB. After that allocations would fail (as there would be no empty space in the virtual address space). And in the case of a memory leak, the virtual pages will be swapped out to the pagefile, freeing up physical RAM. But he noted that Windows Resource Monitor indicated that less than 1 GB of RAM was available

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 Provides access to the window handle of the main form (window) of the application. property Handle: HWND; Description Use Handle when calling Windows API functions that require a parent window handle. For example, a DLL that displays its own top-level pop-up windows needs a parent window to display its windows in the application. Using the Handle property makes such windows part of the application, so