dreambox learning com

Delphi object-oriented Learning Article 7: COMAuthor: banhamtHttp://www.cnpack.org(Please indicate the source and keep it complete)In the previous article, we introduced interfaces. If you have never touched the COM object, you will find the interface really troublesome. You may have the idea of "It is better to define a class directly for convenience.Indeed, interfaces without

COM Technology related websites：Http://www.cppblog.com/mzty/archive/2005/12/23/2002.html The theoretical knowledge that must be mastered for COM programming with VCHttp://www.vckbase.com/vckbase/columnist/yangfeng/index.asp Mr. Yang's personal columnhttp://www.vckbase.com/document/viewdoc/?id=212 COM Programming Primer 1http://www.vckbase.com/document/viewdoc/?id

First, I declare that I am not a master of COM/ATL. Although I have been in contact with them for four years, I have not been able to conduct in-depth research and use them extensively for some reasons at work. However, it is a bit difficult to look back at their painful experiences. Here, I would like to share with you how to learn them, so as to reduce the detours for later users. I personally think it is not easy to learn

; // 调用接口中的方法NewComObject:= nil; // 释放接口endelseShowMessage(\‘对象创建不成功\‘);end; Note that before we run this exe, we need to register our previous COM project with the system: Start-and-run->regsvr32.exe \ "... Project1.dll\ ". After seeing the prompt for a successful registration, we can now run the test program we just wrote to test our COM object, and see if we have a dialog box titled "Hint" and "t

56k modem.2. Briefly describe the main content of network management.3. Briefly describe the principles and functions of VLANs.4. Illustrate the working principle and implementation process of vlsm.5. Compare the differences between connection-oriented and connectionless services. 5. Comprehensive questions (6 points for each question, 30 points in total)1. How does IEEE 802.3 Ethernet (etheernet) Media Access Control (MAC) work?2. compare and analyze the similarities and differences between br

C #. NET Verification Code Intelligent Recognition learning notes --- 06 solve the java jre problem: when JTessBoxEditor. jar is opened, it cannot be found or the Main class com. sun. tools. javac. Main cannot be loaded, Technology qq exchange group: JavaDream: 251572072Download the tutorial and communicate online: it.yunsit.cn I found this problem online, Problem description: My problem is that the follow

a GUID to the specified interfaceIname = Interface (IUnknown)[' {C25A86F1-579A-419A-8CB1-D1B5C6BCB8CB} ']function getname:string;EndIts advantage is that it allows you to specify a class name when you need to use the GUID in your program.For example, now that you know this call to QueryInterface, you must pass a GUID in the first argument, just write the following code:VarUnknown:iunknown;Name:iname;BeginFname.queryinterface (IUnknown, Unknown);Fname.queryinterface (Iname, Name);EndDelphi inter

bandwidth of 64 KB, which of the following four levels can be obtained for a digital signal at any time?2. If the generated polynomial is 10111 and the information bit is 11111011, obtain the code word generated after the cyclic percentile bit and added to the information bit. If the code is sent by HDLC (bit filling), obtain the sending sequence. 4. Application Questions (6 points per question, 30 points in total)1. Analyze the three concession algorithms commonly used by CSMA technology;2. An