We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now

x

ActiveX DLL Help required

icontroldev
icontroldev asked
on
Medium Priority
194 Views
Last Modified: 2011-10-03
HI

I am a beginner to ActiveX DLL development.  I want to create an Active DLL in VB, with various functions that I can call from within my VB EXE application.  Does anyone know of any good online examples that I can use to learn how to achieve this, or could someone post some examples of:

a) A simple DLL with 2 functions that can be called
b) Sample code of how to reference my ActiveX DLL from within my VB application, and how to make these calls, including passing values to it.

I know if I had a good example I could work out the rest of it myself.
Many Thanks
Comment
Watch Question

1. Create a new ActiveX DLL project (this auto-creates Class1)
2. Add the following code to Class1

Option Explicit

Private mMyProperty As String

' example of property get/let
Public Property Get MyProperty() As String
    MyProperty = mMyProperty
End Property
Public Property Let MyProperty(ByVal NewValue As String)
    mMyProperty = NewValue
End Property

' example of public procedure
Public Sub DoSomething()
    ' code to do something
End Sub

' example of public function
Public Function GetSomething() As String
    'GetSomething = <something to get>
End Function

3. Give your Class and Project some names (e.g., SomeProject, SomeClass)
4. Compile the DLL (see also * below)
5. Open another VB project
6. Go to Project > References
7. Find SomeProject in the list and check the box
8. Add the following code to this project:

    Dim objSomeClass As SomeClass
    Set objSomeClass = New SomeClass
    objSomeClass.MyProperty = "Hello, World!"
    MsgBox objSomeClass.MyProperty

This should get you started....

* Before you get too deep in ActiveX, read up on the topic of "binary compatibility".  Here is an excellent article on the topic:   http://users.skynet.be/wvdd2/Compiling/compiling.html

HTH-Jon

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.