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Раздел Образование
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Реферат Курсовая Конспект

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End Sub - раздел Образование, Creating a COM object in ASM Now You Can Run The Application And Test The Server By Clicki...

Now you can run the application and test the server by clicking the Raise button. Do be careful, there is no error checking to see if you put a valid number in Text2. What you are seeing is Visual Basic running an assembly language server.

Note the sample program available for download is somewhat more complex, as it creates two copies of the server object to test. This demonstrates each object is capable of holding it's own private data information. It is quite true this server doesn't do all that much, but it is a baby step to full COM functionality from assembly.

Bibliography:

---------------------------------------------------------------------------------------------------------------------"Inside COM, Microsoft's Component Object Model" Dale Rogerson

Paperback - 376 pages CD-ROM edition

Microsoft Press;

ISBN: 1572313498

(THE fundamental book on understanding how COM works on a fundamental level. Uses C++ code to illustrate basic concepts as it builds simple fully functional COM object)

"Automation Programmer's Reference : Using ActiveX Technology to Create Programmable Applications" (no author listed)

Paperback - 450 pages

Microsoft Press;

ISBN: 1572315849

(This book has been available online on MSDN in the past, but it is cheap enough for those of you who prefer real books you can hold in your hand. Defines the practical interfaces and functions that the automation libraries provide you, but is more of a reference book then a "user's guide")

Microsoft Developers Network <http://msdn.microsoft.com>

"Professional Visual C++ 5 ActiveX/Com Control Programming" Sing Li and Panos Economopoulos Copyright April 1997,

Paperback - 500 pages (no CD ROM, files available online)

Wrox Press Inc;

ISBN: 1861000375

(Excellent description of activeX control and control site interfaces. A recent review of this book on Amazon.com stated "These guys are the type that want to rewrite the world's entire software base in assembler." Need I say more?)

"sean's inconsequential homepage <http://www.eburg.com/~baxters/>"

(Various hardcore articles on low-level COM and ATL techniques. Coded in C++)

"COM in Assembly Part II" http://asmjournal.freeservers.com Bill Tyler

(no copyright noted)

Assembly Programming Journal July-Sep 99

(Basic object creation and use through COM-like interfaces)

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Creating a COM object in ASM

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Creating a COM object in ASM
Copyright © Dec 27, 2000 by Ernest Murphy ernie@surfree.com For educational use only. All commercial use only by written license. Revised December

Increments or decrements the lock count
LockServer keeps the class factory instanced (helpful if one has to make numerous object copies). CreateInstance is the workhorse here, it is used to creates the object's "work

MyComObject ENDS
The first point is I have great latitude in defining this structure. The only element that the COM contract imposes on it is that it contain a DWORD pointer to the vtable of functio

Interface IMyCom : IUnknown
{ [propget, helpstring("property Value")] HRESULT Value([out, retval] long *pVal); [propput, helpstri

Coclass MyCom
{ [default] interface IMyCom; }; }; This file can be used as

RaiseValue PROTO :DWORD, :DWORD
BIG difference... but for a simple reason. Interfaces written for type libraries are as general as can be, and are directed at clients such as Visual Basic, and VB is designed to ho

Typelib MyCom.tlb
Making it the first resource element is important, as later on we will be using the LoadTypeLib API function to extract this library, and this function expects to find the library a

HKEY_CLASSES_ROOTTypeLib{A21A8C42-1266-11D4-A324-0040F6D487D9}1.0HELPDIR
(Default) "C:masm32COMMyCom" One key value here is variable, that is the path and name of the server dll itself. On my system I placed it at &quo

AddRef_MC endp
AddRef is a bit unusual in that it does not return a HRESULT (failure code), instead it returns the object count. The return value is undefined in the COM contract, but it is tradit

RaiseValue ENDP
MyCom.dll, the server code ---------------------------------------------------------------------------------------------------------------------To build the