We then declare a constructor that takes a reference to the browser control and make it available via a property. A destructor is also declared. Listing 3 shows how the constructor is implemented. 1constructor TNulWBContainer.Create(const HostedBrowser: TWebBrowser); 2begin 3 Assert(Assigned(...
For example, for our main program form to receive the messages use: DragAcceptFiles(Form1.Handle, True); Listing 2 Handle the WM_DROPFILES message. In Delphi we can declare a message handler for this event in the main form's class declaration: procedure WMDropFiles(var Msg: TWMDropFiles);...
I'vedone it!). However the Windows API provides three functions that assist in extracting the code. In the next section we'll review the API calls and write some Delphi wrappers to make them easier to use before finally developing our version information...
"Access denied" when trying to get a handle from CreateFile for a Display "An attempt was made to access an unnamed file past its end " "error LNK2019: unresolved external symbol" with class constructor "No such file or directory", but the file exists. "some unicode in this file could...
proper prologue code to make sure that exportable code is generated. Example: int FAR PASCAL _export foo(int, float) Using _export eliminates the need for an EXPORTS section in your module definition file. Whenever you declare a class as _export, ...
1.1 DATASNAP EXAMPLE DATA WHERE YOU WANT IT In this white paper, I urge you to play along with the demos and examples. Although Delphi supports many different database systems using DBX4, dbGo for ADO or other data access technologies, in order to make it easy to play along with the ...
First of all, fell free to send corrections or alternative ways to this method The main goal of this page is instruct how to install the latest PascalSCADA snapshot on the latestLazarusversion. Why I don’t explains how install it on Delphi or on a outdated Lazarus version, is question ...
You simply need to declare your "data" parameter as "constref" or"const" as well, just like your "v" parameter. Have a look at this piece of code (The complete code is attached): type TMyRecord = record Str: AnsiString; Index: Integer; ...
Is there a Telegram messenger component for use in Delphi? The first step will be to download theWebsocketscomponents suite ofESEGECEherein order to use theirTsgcTDLib_Telegramcomponent. Declare a new Telegram application To be allowed to connect to theTelegram Messengercloud, you will need an AP...
Also you must declare Bit1 in your dialog class. Otherwise it will be destroyed when your click event handler ends.Try using CImage instead:#include <atlimage.h> #include <Gdiplusimaging.h>class CYourDlg : public CDialog { public: CYourDlg CImage m_Bit1; ... virtual BOOL OnInitDialog...