calling a c# dll with vb6

Miguel

Hi all! I'm really new to vb6 and have some knowledge of C# and would like to create a vb6 program that calls a C# dll but I've found a huge problem which is, I always get a "dll runtime error 453". I've been googling for some hours and can't find the solution for this problem... please help. thanks a lot B33bs (here's the code sample... it's just an example) Private Declare Function func Lib "C:\Documents and Settings\...\dllnewAtt.dll" () As String Private Sub Command1_Click() Dim nSpeed As String nSpeed = func() Form1.Text1.Text = nSpeed End Sub

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

naura pax17y ago
Accepted answer
One of the possible issues could be that dll is not registered
here you'll have to register it using "regasm /tlb:PhysServer2.tlb PhysServer2.dll" and then add the assebly to global assembly cache using "gacutil /I PhysServer2.dll"
Later on you'll find the dll is in Available References list in Project->Reference
you'll just have to select it and create an object of the class in dll type library.
Miguel17y ago
well finally I got it... Private Declare Function func Lib "C:\Documents and Settings\...\DllSuccess.dll" () As String Private Sub Command1_Click() Set aux_obj = CreateObject("DllSuccess.Class1") x = aux_obj.returnstring() Form1.Text1.Text = x End Sub
Miguel17y ago
hello again... I've registred the dll following all of the steps indicated in the link you sent... created the strong name, done the tlbexp regasm gacutil but then, it says it can't find the dll entry point...
Miguel17y ago
I'm going to try that... hope it works, thank you
naura pax17y ago
hi,
you will have to use com callable wrapper for that purpose. It requires a lot of steps to be followed to be used successfully.
follow this link and read the article carefully to get better answer.
http://msdn.microsoft.com/hi-in/library/ms973802(en-us).aspx