As is usual with COM, we have to create an object that implements an interface – IDropTarget in this case – and then tell Windows about it. Windows then calls the methods of our implementation of IDropTarget to notify us of drag drop events. If we accept a dropped object, Windows makes...
Create help file topics by going to the menu section«Settings -> Add topic», or right-click on the project tree on the left, then from the menu select«Add -> Add topic». For making the complete description of Delphi-application, create a topic for each of its object. In ...
It's much simpler to create a resource file that is identified by an ordinal (e.g.200) than it is to create one identified by a string (e.g.'MY_RESOURCE'), since the resource header records are a fixed size in the first case and are variable in the second case. We will only co...
!> in c# . Check is object null - What are the options? .Net 4 FileLoadException permissions problem With windows service .NET code to extract data from an excel sheet and create a text file having a specific format .Net Core 3.0 Console App. Microsoft.Data.SQLClient is not supported ...
In short, the idea is to create, display, and destroy the "login" dialog before creating the main form. The Delphi MainForm When a new Delphi project is created, "Form1" automatically becomes the value of the MainForm property (of the global Application object). To assign a different...
63procedureTForm1.FormCreate(Sender:TObject); 64var 65Reg:TRegistry;// the registry 66State:Integer;// state of window 67begin 68Reg:=TRegistry.Create; 69try 70// Open required key - exit if it doesn't exist 71Reg.RootKey:=HKEY_CURRENT_USER; ...
TheFindClass()Delphi function locates aclass type from a string. The search goes through all registered classes. To register a class, a procedureRegisterClass()can be issued. When the FindClass function returns a TPersistentClass value, cast it to TFormClass, and a new TForm object will be cr...
Object Pascal\DataBase\FireDAC\Samples\Comp Layer\TFDGUIxLoginDialog\Main. Subversion Repository: You can find Delphi code samples inGitHub Repositories. Search by name into the samples repositories according to your RAD Studio version. Description ...
handles to the "AND" and "XOR" bitmaps to the Windows API function CreateIconIndirect() and use the returned icon handle in your application. Example: procedure TForm1.Button1Click(Sender: TObject); var IconSizeX : integer; IconSizeY : integer; ...
Earlier we have learnedhow to create a Python Type using Python4Delphi componentsin a Delphi GUI app. From the post we know, how to create and use Python4Delphi components such as TPythonEngine, TPythonModule, TPythonType by a simple drag and drop in our application. But ...