COM object -problem with retrieving values.

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1

Hi

i am working on a project where I have to call a COM object and extract data out of it. we are running on V7.1.2 and currently not licensed for WmDotNet package, so I have to build a temporary solution in V6.1 SP2.

I have registered the dlls of the COM object in the windows server machine.

problem:

The COM object has properties like A1…A6 (integers or strings), C1 (Collections in VisualBasic).

I am able to instantiate the COM object, set the properties of A1…A6.

VB Code

‘name’ is input given by user

object is the COM object.
object.A1 =‘D1’
.
.
.
object.A6=‘D6’

object.C1.Add(name)

object.login(username,pwd);
object.method();

Dim returnValue As Object = DBNull.Value
returnValue = object.C1(name).Value // i have problem in this last step while converting in webMethods.

-so in wM , what I did is
created a object of java.Util.list (Suppose List1) and added one string ‘name’ there.
invoked the win32.COM.dispatch:invoke by passing List1 to params, and dispname=C1. It worked as it allowed me to assign the value.

Now I could call the login method of the COM object successfully by passing the pDispatch.

The problem comes when I call the next method (suppose Method1). what this method does is, it does not return the data to me in the “result” field of the win32.COM.dispatch:invoke function. But it actually sets the data in the input Collection object (C1) which I passed as a java.util.list.

Below is corresponding VB code

Dim returnValue As Object = DBNull.Value
returnValue = object.C1(name).Value

So, I called method1. after that I called win32.COM.dispatch:invoke function to get the value in the java.util.list

dispname=C1,
accessType =Get.

but the “result” I get after this call is like win32.COM.WmDispatch in the pipeline. I am not able to understand how to extract the java.util.list that I passed originally.

If you guys have any clue, please reply.

Thanks.
dg

2

Dim d1 As Variant
Dim d2 As Variant
Dim d3 As Variant

comObject.sampleMethod d1, d2, d3
MsgBox “First value returned is “ & d1(0)

Above is the VB code , where by calling sampleMethod it actually returns the values from the COM Object in d1, d2, d3.

How do I do this in webMethods V6.1 My question is specifically how do I pass the params to the

win32.COM.dispatch:invoke service

(I have tried passing three object List to the params list, but it fails with (null). Error Code = 8002000f.

Thanks
Dg.