Please tell me how to make DLLs?

I want to create some new functions and put it in a DLL
then declare it and use it.
But How?
I tried this...Man I am stupid
(I open a new DLL project)
sub abc
msgbox "abc123"
end sub
'module
public declare function abc()

'After compile to DLL i use it like this
public declare sub abc lib "c:\abc.dll" ()

Private Sub Command1_click()
abc
end sub
But it keep on display an error
Could anyone tell me how to make a DLL?

Jian, As for Visual Basic, it only can produce 2 type of DLL. That call Active DLL(In process) and Avtive EXE (Out of Process).

Both must be include in the Project|References and can not declara as the normal Library Type DLL that compile from C/C++.

The following is the way to declare a Active DLL.
Sample

Code:

---

Option Explicit
Dim Obj As Class1

Private Sub Form_Load()
  'Create a new instance of the Object (DLL)
  Set Obj = New Class1
End Sub

Private Sub Form_Unload()
  'Destroy the Object (DLL)
  Set Obj = Nothing
End Sub

---

As from your sample, you no need to have a Basic Module file in you DLL project folder. "coz Basic Module normally juz use to declara the API function or some public variable.

Code:

---

'In your Class Module
Public Sub abc()
  msgbox "abc123"
End Sub

---

Code:

---

'In your Form
Option Explicit
Dim Obj As Class1

Private Sub Command1_Click()
  Set Obj = New Class1
  Obj.abc
  Set Obj = Nothing
End sub

---

Well, hope this made sense to you.

Thanks for your RE anyway.
But I really wanna know how to make a DLL to be invoked by other progs.