Could not create output file <Filename> 不能建立输出文件<Filename> Could not load RLINK32.DLL 不能加载RLINK32.DLL Data type too large: exceeds 2 GB 数据类型太大:超过2GB Declaration of <Name> differs from previous declaration <Name>的说明与先前的说明不同 Default property must be an array...
例如,在对(AnObject 进行强制类型转换前,确定(AnObject 和TEdit是否指针兼容: if (AnObject is Tedit) then Tedit(AnObjject).text := 'wudi_1982'; 注意在这个例子中不要再使用as进行强制类型转换,这是因为它要大量使用RTTI,另外还因为,在第一行已经判断Foo就是TEdit,可以通过在第2行进行指针转换来优化。
(3)切换到Object Inspector,从Object Inspector选取ScratchPad的主窗体MainForm; (4)切换到Object Inspector的Events页面,双击OnCreate事件,此时会显示Code Editor,在Code Editor中输入代码: 1 2 3 4 procedureTMainForm.FormCreate(Sender: TObject); begin Application.OnHint := MyOnHint; end; (5)编译并运行程...
如果在StringList里面进行排序并查找,可以用下面的方法: procedure TForm1.FormCreate(Sender: TObject); var MyList: TStringList; Index: Integer; begin MyList := TStringList.Create; try MyList.Add('Animals'); MyList.Add('Flowers'); MyList.Add('Cars'); MyList.Sort; { Find will only work...
向代码中增加方法和数据字段(Adding Methods and Data Fields to Code) 现在可以看出,在快速创建Windows应用程序的UI(用户接口)部分,Delphi是一个强有力的工具。它创建了事件处理程序,因而编程人员可以输入代码驱动其应用程序。但不久将会发现,需要在实际应用中添加更加复杂的代码。
问用Delphi在网格面板中移动控件EN这不是拖动，当项目的列和行都在改变时，改变发生在两个步骤中。使用...
procedure FormActivate(Sender: TObject); procedure FormCreate(Sender: TObject); procedure FormClose(Sender: TObject; var Action: TCloseAction); private { Private declarations } public { Public declarations } end; var Form1: TForm1; g_hEvent: THandle; ...
TConnAckEvent = procedure (Sender: TObject; ReturnCode: integer) of object; type TfMQTTForDelphi = class(TForm) Memo1: TMemo; IdTCPClient1: TIdTCPClient; Button1: TButton; Button2: TButton; edtHost: TEdit; edtPort: TEdit; Button3: TButton; ...
Delphi uses Object Pascal and C++Builder uses standard C++.I'm trying as much as possible to make sure that this book is not tied to any particular Delphi version. However, it is important to pay attention to which version of different pieces of software we are using....
Application.CreateForm(TFormSettings, FormSettings); Application.Run; When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold: const EL = #13; procedure TForm1.ButtonMultilineClick(Sender: TObject); begin ShowMessage('...