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• Owner Vs PArent and Taction shortcuts on Frames

  - by Fred

  I have a form with a panel. I create frames at runtime and display them on the panel by setting frame's parent property to the panel. When creating panels I do not set the owner property because i manage myself the lifetime of the frame. Until now i got no problem. Next I put an TActionList on the frame with some shortcuts on the actions. I…

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• How I can get information about the scrollbars of an Webbrowser control instance or the IE Webrowser?

  - by Salvador

  I need to get information about the scrollbars (position, size, visibility) of a Webbrowser control of an external application, I tried using the GetScrollBarInfo function from my previous question, but the function always return false, I checked this function with another applications and works fine , but not with the IE or the Webbrowser…

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• TStringGrid with BOTH editing AND range selection?

  - by Kevin Killion

  Question: Can anyone point to an article or code samples anywhere on how to provide BOTH editing AND range selection in a TStringGrid? Yes, I KNOW there are third-party grids that do this, but it's frustrating that the built-in grid lacks this basic capability. Background: It's pretty normal to expect to be able to both edit a cell…

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• how can i create dbgrid with composite columns?

  - by khelifaadm

  how can i create dbgrid with composite columns, example :dbgrid header | name | | first | last |

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• How expose the properties of an component created in an activex form

  - by Salvador

  You can publish the properties of an control that is inside a activex form? example I have a form with an TAdoconnection component, I wish the properties of this component can be modified by the user when he loads my activex control. UPDATE @TOndrej gives me a very nice sample, but this sample only works for components derived from…

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• How to simulate a dial-up connection for testing purposes?

  - by mawg

  I have to code a server app where clients open a TCP/IP socket, send some data and close the connection. The data packets are small < 100 bytes, however there is talk of having them batch their transactions and send multiple packets. How can I best simulate a dial-up ut connection (using Delphy & Indy components, just FYI)? Is…

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• Delphi7 - How can i copy a file that is being written to

  - by Simon

  I have an application that logs information to a daily text file every second on a master PC. A Slave PC on the network using the same application would like to copy this text file to its local drive. I can see there is going to be file access issues. These files should be no larger than 30-40MB each. the network will be 100MB…

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• How to publish a list of integers?

  - by Mason Wheeler

  I want to make a component that includes a list of integers as one of its serialized properties. I know I can't declare a TList<integer> as a published property, because it doesn't descend from TPersistent. I've read that you can define "fake" published properties if you override DefineProperties, but I'm not quite sure…

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• Display field from another table in SQL

  - by Roland Bengtsson

  I'm a newbie with SQL... Now I want to do display some instances of AddrDistances from DevExpress CxGrid with SQL. Select Cast((DistanceAsMeters * 0.001) as Decimal(8,1)) DistanceAsKm, bold_id, created, fromAddress, toAddress From AddrDistance Where DistanceAsMeters = 0 and PseudoDistanceAsCostKm = 0 and not…

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• Conseqences of assigning self

  - by Vegar

  Hi, Found a piece of code today, that I find a little smelly... TMyObject.LoadFromFile(const filename: String); begin if fileExists(filename) then self := TSomeObjectStreamer.ReadObjectFromFile(filename); end; If this code works, it will atleast leak some memory, but does it work? Is OK to assign to self in…

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• Why do Pascal control structures appear to be inconsistent?

  - by 70Mike

  Most Pascal control structures make sense to me, like: for ... do {statement}; if (condition) then {statement}; while (condition) do {statement}; where the {statement} is either a single statement, or a begin ... end block. I have a problem with: repeat {statement-list} until (expression); try {statement-list}…

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• Manually Writing the HTML in TWebBrowser

  - by nomad311

  I am using the strategy suggested here: http://cc.embarcadero.com/Item/23992 to get my HTML in the TWebBrowser, but I get a bunch of JavaScript errors when the page loads. If I click yes enough times I can see a page with no formatting and I'm guessing the page does nothing. My theory is that because the links in…

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• how important to register(license) your own components?

  - by XBasic3000

  i am new to component building, and i had notice to other components has a a comment on top of there units like agreement, terms and condition etc. wither its free or commercial. How important is to register(license) your own component and how/where? and when do you need to register it? how about the freeware?…

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• How to modify TList<record> value?

  - by Astronavigator

  How to modify TList < record value ? type TTest = record a,b,c:Integer end; var List:TList<TTest>; A:TTest; P:Pointer; .... .... List[10] := A; <- OK List[10].a:=1; <- Here compiler error : Left side cannot be assined to P:=@List[10]; <- Error: Variable requied

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• How do I mock a method with an open array parameter in PascalMock?

  - by Oliver Giesen

  I'm currently in the process of getting started with unit testing and mocking for good and I stumbled over the following method that I can't seem to fabricate a working mock implementation for: function GetInstance(const AIID: TGUID; out AInstance; const AArgs: array…

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• Visibility of reintroduced constructor

  - by avenmore

  I have reintroduced the form constructor in a base form, but if I override the original constructor in a descendant form, the reintroduced constructor is no longer visible. type TfrmA = class(TForm) private FWndParent: HWnd; public constructor Create(AOwner: TComponent; const AWndParent: Hwnd);…

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• Usage of the Active Report In the Delphi6

  - by Hamid

  Hi All Can I use the Active Report In the Delphi6?

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• How do I make my program run with different privileges at Windows 7 startup?

  - by iira

  Hi, I am trying to add my program run in Windows 7 startup, but it doesn't work. My program has an embedded UAC manifest. My current way is by adding a string value at HKCU..\Run. I found a manual solution for Vista from…

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• Why do conditional breakpoints slow my program down so much?

  - by Bob

  When I'm debugging something that goes wrong inside a loop, say on the 600th iteration, it can be a pain to have to break for every one. So I tried setting a conditional breakpoint, to only break if I = 600. That works,…

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• List local printers

  - by vladimir

  hi all, i am using this routine to list the local printers installed on on a machine... var p: pointer; hpi: _PRINTER_INFO_2A; hGlobal: cardinal; dwNeeded, dwReturned: DWORD; bFlag: boolean; i: dword; begin …

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• Converting an AnsiString to a Unicode String

  - by jrodenhi

  I'm converting a D2006 program to D2010. I have a value stored in a single byte per character string in my database and I need to load it into a control that has a LoadFromStream, so my plan was to write the string to a…

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• Looking for solution to persist rows sequence in a database table that allow efficient reordering at

  - by Chau Chee Yang

  I have a database table. There is a field name "Sequence" that indicate sequence when user presents the rows in report or grid visually. When the rows are retrieved and presented in a grid, there are few UI gadget that…

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• Detecting a stale Mutex

  - by sum1stolemyname

  Is there any technique or tool available to detect this kind of a deadlock during runtime? picture this in a worker thread (one of several, normally 4-6) try WaitForSingleObject(myMutex); …

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• Resize PNG image

  - by serhiyiv

  HI! Could you please tell me how to resize a .png image. Or better give an example. I've been searching for the answer for a long time and it seems that nobody knows how to resize a .png image…

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• How to prevent form from being activated when the users clicks on it?

  - by riot_starter

  I have a main form and non-modal autocomplete form. How can I prevent the autocomplete form from being activated by the user, when the user clicks on the list in the autocomplete form? So,…

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