Define and explain COM?

Correct Answer: Marshalling is the process of packaging and sending interface method parameters across thread, process or machine boundaries It is not necessary when the client and the server are on the same computer

Correct Answer: IUnknown as an interface of a COM object Every COM object has to support IUnknown, besides optionally adding other interfaces IUnknown is made of QueryInterface, AddRef and Release

Correct Answer: By setting the columnSpan property for cells of each row as required

Correct Answer: Check EIBRESP after the call or use the HANDLE condition

Correct Answer: Marshalling is the process of gathering data from one or more applications or non-contiguous sources in computer storage, putting the data pieces into a message buffer, and organizing or converting the data into a format that is prescribed for a particular receiver or programming interface

Correct Answer: NTFS, FAT & FAT 32 are the file systems of NT

Correct Answer: Visual Basic is not support Inheritance and Data binding OOPS Concept

Correct Answer: With the help of Excel App instance we can execute a Macro in VB code EXcelAppInstanceApplicationRun("MacroName")

Correct Answer: DDE (Dynamic Data Exchange) a communication protocol that let applications call each other OLE was the first protocol that enabled users and programmers to create compound documents?that is documents that contain data from different applications (for example an Excel worksheet inside a Word document)

Correct Answer: Dim obj as OBJCLASS with eitherSet obj = New OBJCLASS orSet obj = CreateObject(OBJCLASS?) orSet obj = GetObject( , OBJCLASS?)orDim obj as New OBJCLASS