Passing unitialized arrays to an API...

[LocutisofBorg]

First of all, cool forum. I like it a bunch. Second, thanks for letting me join.

 

Here is my problem. In my VB6 project the following piece of code worked just fine:

 

BAS Module:

Declare Function WFGetQueueNames Lib "WFAPI32" (ByVal hSession As Long, sQueues() As String) As Long

 

Form Code:

 

public function blablabla() as boolean

Dim strQueues() As String

.

. Do some stuff

.

 

ret = WFGetQueueNames(lSession, strQueues)

 

end function

 

The call to WFGetQueueNames is a third party API that works just fine in VB6. When I try to call this in VB.NET I get the following error message:

 

"An unhandled exceptionof type 'System.NulLReferenceException' occurred in ACTS.exe

 

Additional information: Object reference not set to an instance of an object."

 

Basically what the API does is take a blank, unitialized array, allocates memory and returns a fully usable VB6 array that I can then to a UBound on, etc...

 

I have searched everywhere and cannot find any answers to this question. Anyone who can help would be my new hero. Thanks in advance.

[LocutisofBorg]

bump. If anyone has any ideas please let me know, I'm dead in the water right now... bump.

[PlausiblyDamp]

You could try something like sQueues.Initialize() and see if that helps...

[LocutisofBorg]

Tried that and it doesn't work. Thanks though. Anyone else have any ideas?