DOT NET Interview Questions - DotNetSpider

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Using Type library import tool. Tlbimp.exe yourname.dll.
Using interopservices.System.runtime.Interopservices namespace contains class
TypeLib Converter which provides methods to convert COM classes and interface in
to assembly metadata.
Make your custom wrappers.If your COM component does not have type library
then the only way to communicate is writing custom wrappers. That means
communicating directly with COM components.
(I) Once i have developed the COM wrapper do i have to still register the
COM in registry?
Yes.
(A)How can we use .NET components in COM?
Twist :- What is CCW (COM callable wrapper) ?, What caution needs to be taken in
order that .NET components is compatible with COM ?
.NET components can not be used in straight forward way with COM.You will need to create
CCW in order that COM components communicate with .NET assemblies.Following are the
different approaches to implement it :-
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Explicitly declare interfaces..
Public Interface ICustomer
Property CustomerName() As String
Property CustomerCode() As String
Sub AddCustomer()
End Interface
Public Class Customer
Implements ICustomer
Private PstrCustomerName As String
Private PstrCustomerCode As String
Public Sub AddCustomer() Implements ICustomer.AddCustomer
Try
‘ addin of database code can go here
Catch ex As Exception
Throw ex
End Try
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