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In this example: Code File: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs; Type tform1 = Class (tform) Procedure formcreate (Sender: tobject ); procedure formdestroy (

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Problem Source: http://www.cnblogs.com/del/archive/2008/05/26/1207811.html#1475006 In this example: Code File: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs,

One sentence: Use comparemem to compare memory. {Compare static array} procedure tform1.button1click (Sender: tobject); var arr1: array [0 .. 3] of ansichar; arr2: array [0 .. 3] of byte; begin arr1 [0]: = 'a'; arr1 [1]: = 'B'; arr1 [2]: = 'C

// Declaration: loadstring (hinstance: hinst; {EXE or DLL handle} uid: uint; {resource ID} lpbuffer: pchar; {buffer} nbuffermax: INTEGER {buffer size }): integer; {actual length of the returned string} // If there is such a string resource:

{Function for extracting words from a string} procedure strtowordlist (STR: string; var list: tstringlist); var P: pchar; I: integer; begin if list = nil then list: = tstringlist. create; List. clear; {remove duplicates} List. sorted: = true; List.

Example: Change the desktop Wallpaper VaR BMP path: pchar; begin BMP path: = 'C: \ temp \ test.bmp '; systemparametersinfo (spi_set1_wallpaper, 0, BMP path, spif_updateinifile); end; Too many systemparametersinfo parameters...

Sysutils. isleapyear (); dateutils. isinleapyear (); Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs, stdctrls; Type tform1 = Class (tform) Procedure formcreate (Sender: tobject );

Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs; Type tform1 = Class (tform) Procedure formcreate (Sender: tobject); end; vaR form1: tform1; implementation {$ R *. DFM} uses dateutils;

CodeFile: // The grouping condition can be whereprocedure tform1.button1click (Sender: tobject); begin with adodataset1 do begin close; commandtext: = 'select continent, AVG (area) as average area '+' from country where continent = "South

Some friends once praised me: this is easy to understand and can simplify complicated problems; I hope that my understanding of the interface can be helpful to everyone. However, I personally understand more components and hope to point out the

Test: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs, stdctrls; Type tform1 = Class (tform) button1: tbutton; memo1: tmemo; procedure button1click (Sender: tobject); end; var

EMF file is an Enhanced Metafile in windows. This example uses the simplest Code Creates an EMF file. Createenhmetafile (DC: HDC; {reference DC, 0 indicates reference current display device} filename: pchar; {file name, nil indicates

Automatically create an SDI application Program The program contains beautiful menus: The menu data is recorded in the Form file: Object mainmenu1: tmainmenu images = imagelist1 left = 8 Top = 152 object file1: tmenuitem caption = '&

Problem Source: http://www.cnblogs.com/del/archive/2008/11/04/1326105.html#1533947 In this example: Code File: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs,

Order by ASC | DESC In this example: Code File: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs, stdctrls, extctrls, grids, dbgrids, DB, ADODB; type tform1 =

Problem Source: http://www.cnblogs.com/del/archive/2008/05/15/1114450.html#1199402 In this example: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs, percentages, stdctrls;

Unit wtimer; interfaceuses windows, sysutils, syncobjs; Type handler = Class (tsynchroobject) protected fhandle: thandle; fperiod: longint; handler: tdatetime; flasterror: integer; flongtime: int64; public constructor create (manualreset: Boolean;

Problem Source: http://www.cnblogs.com/del/archive/2009/03/09/1234066.html#1471535 In this example: Custom class (tmyshape) unit: unit Unit2;interfaceuses Classes, Controls, ExtCtrls;type TMyShape = class(TShape) private fMouseFlag:

Tpanel is used as a container in the program. You need to give it a background image. It turns out to be a problem! I found that the control tscrollbox, which I often use, is a good alternative. In this example, we need to add two image resources