It is surprisingly common that Delphi applications are reported as (potentially) harmful by AV applications. It happened to me a while ago, using Delphi 2009, see http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Archives/Computing/2010_March_20#Delphi.2FAVG_Issue. At SO, we also have Virus in Delphi 7 Accidentally created a virus? and many more. It might be the actual Induc Virus. But most likely, it is … Read more
With DDevExtensions you can disable storing these properties in the dfm: http://andy.jgknet.de/blog/?page_id=10 Adds Explicit* property remover to keep DFM files compatible to older Delphi versions
program Guid; {$APPTYPE CONSOLE} uses SysUtils; var Uid: TGuid; Result: HResult; begin Result := CreateGuid(Uid); if Result = S_OK then WriteLn(GuidToString(Uid)); end. Under the covers CreateGuid() calls one of the various APIs, depending on the platform. For example on Windows, it nowadays calls UuidCreate.
There most likely is not (at the moment): From the homepage: It is a pure-VCL/CLX control, meaning it is not a wrapper for Microsoft Windows controls and so no run-time library is required. CLX or Component Library for Cross Platform is the cross-platform equivalent of the VCL – Borland’s widget library. From Nakeymonkey – native … Read more
I wrote a series of articles last year on this, with source code. VMware and Wine detection are here. Virtual PC is here. All three of these have pretty iron-clad detection because there are documented callbacks to the hypervisor (in the case of Wine, an extension to a standard DLL). I put up an untested … Read more
Scrolling origins An action with the mouse wheel results in a WM_MOUSEWHEEL message being sent: Sent to the focus window when the mouse wheel is rotated. The DefWindowProc function propagates the message to the window’s parent. There should be no internal forwarding of the message, since DefWindowProc propagates it up the parent chain until it … Read more
What ever scheme you use, it may be handy to know that you can actually rename a running .exe file. So rename file, copy in new file works nice. And the next time someone launch the program they will launch a the new version. This is ofcourse very handy in enviroment where many users run … Read more
Let us consider the following three type declarations: TProcedure = procedure; TMethod = procedure of object; TAnonMethod = reference to procedure; These are all very similar to each other. In terms of calling instances of each of these three types, the calling code is identical. The differences arise in what can be assigned to variables … Read more
Take a closer look at TTabControl / TTabItem in the unit FMX.TabControl. This is your perfect example because it basically needs to solve the same problem. The following function is what you need to override: procedure DoAddObject(const AObject: TFmxObject); override; This is called when a control is added to your control. Override this function so … Read more
This is from long ago as an escape character to enable you to have consts for control characters in a more readable way. const CtrlC = ^C; begin Write(Ord(CtrlC)); end. This defines a Char constant with value #3, then writes 3 in Borland Pascal 7, and I remember seeing it years before that too. I … Read more