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501: Delphi's DBGrid support so that the mouse wheel
Most of the current round of the mouse has a mouse, for example, when we browse the Web, the mouse wheel up and down movement, the page will automatically scroll up and down. Mouse wheel really gives us a lot of the convenience brought about by the ...

502: How to achieve a document DELPHI cutting / portfolio
The so-called paper cutting, a file is cut into several small files. Approach is to target a file to "stream" to read out, and then according to block (Block) Save as file size, respectively. Portfolio document is to document a number of d...

503: Delphi design Chinese / English interface switching techniques
First of all, a new project, and then add some form controls FORM1, I assume that by adding the following controls: three TBUTTON button, two TCHECKBOX, a TGROUPBOX and a menu. Then replaced by their Chinese CAPTION attribute information, and then ...

504: Produced by Delphi to the browser application interface
1, choose "file \ new \ other" in the new items dialog box, select the activex option, in which the option to create activex form. Will pop up a dialog box for the input you have the name of the establishment of activex component, object p...

505: Delphi streaming compression and decompression in the application of flow
A description of categories 1, the base class TCustomZlibStream: category category TCompressionStream and TCustomZlibStream is the base class type TDecompressionStream, it has a major attribute: OnProgress, in the type of compression or decompressi...

506: Delphi-bit parallel port to control the operation
One parallel port to read and write In assembly language can be used in, out instructions to operate parallel port, and in Delphi did not correspond to the function, methods can be carried out on the parallel port to read and write, it is fortunate...

507: Delphi preparation of background monitoring software
First, the current process into a system service: The purpose of the task list in the process hidden. API function calls to achieve RegisterServiceProcess. Second, the definition of global hotkeys (in this case defined hotkey Ctrl + Del + R), thes...

508: Delphi prepared with VxD device driver
Delphi 3.0 with the preparation of vxd device driver, compiled in delphi 3 under through, delphi 2 there is no test, delphi 4 of the object the establishment of m $ linker 5.12.8181 documents can not be identified, here is a compilation of the use o...

509: OpenGL programming with Delphi for learning experiences
The first is to initialize. Initialization, there are a number of work to be done: ① create device (Device Context). (Note: With regard to DC, not the same asked a variety of information such as the equipment environment, device, device context, b...

510: DELPHI Programming 3DS animation player
1. Decomposition of the DOS of the picture stored in the database (1) to enter the KeyFrame module 3DS, in the Output options. BMP types of files. All graphics files will be stored in the same directory (such as a directory c: pic, documents are av...

511: Create a dynamic menu with Delphi
1. First of all, the data to determine the source of the dynamic menu, that is heading to determine the dynamic menu system from the Windows registry, or from a database, or from a subdirectory, the main function of the process may be. It is assumed...

512: The use of Delphi procedures for the preparation of Socket Communications
ClientSocket components for the client components. It is the communication of the requesting party, that is to say, it is the initiative to establish a connection with the server-side. ServerSocket component for server-side components. It is the co...

513: Design by Delphi "steal 30" game
The principle of win How can so easily won? This is going to find the law. I created a small program, so that you can single computer. Figure interface. If you start off, it is not my claim, you mustcomputer; if the computer off first, then look a...

514: On the "QQ Wizard list," the source code analysis and imitation
Discovered vulnerabilities: We have a computer after the landing had QQ, QQ, when the next time you start you will see a list of the number of drop-down menu will appear in this number, these numbers are actually stored in the QQ installation direc...

515: Delphi programming interface of the two traps
a) can not cast an object reference into the statement quoted does not achieve the type of interface, even if the actual achievement of this object of the interface (Oh, the advantages of a mouthful). b) When an object variable is assigned to an in...

516: Delphi components based on a simple design example
This is a count of the components can, in order to simple, I in seconds, when the beginning, he started to increase from 0, and show up to 3600 when it returned to 0, so the cycle. Of course, it also can stop, pause, continue. In addition, he also h...

517: Delphi components based on the concept of design
First, components of the summary hierarchy Under normal circumstances, VCL components for Tcomponent started from. Its most obvious attributes of the characteristics is that it can be adopted in the design of objects used to manipulate the view, In...

518: On the Delphi development under the OpenGL graphics
OpenGL drivers in general to the binary form of library files. It can dynamically connect to your program. In the Windows platform, it is to become the form of DLL (in your system directory to check opengl.dll). Since Delphi can be the beginning of ...

519: Delphi-depth understanding of the message mechanism
First, create a window VCL in a handle (Handle) the real property inherited from the window controls all TWinControl, it TWinControl creation from the start. VCL in the window was not established according to our imagination to create the process,...

520: Delphi deal with SQL Server multimedia data
First, select the database 1. Issue Commonly used desktop database, such as Access, Visual FoxPro, etc., the use of relatively simple, it can manage multimedia information. However, due to lack of powerful database engine, a small amount of multim...


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