create null reference

[jspaarg]

I wish to create a null reference as part of an error handler.

Is there such a thing as a "Null Reference" that I can create?

Thanks

[YuGen]

I am sorry but your question seems to be too general.

A possible problem:
- you have to communicate with a 3rd party library written in C/C++;
- there is a function with one of its parameters declared as a pointer;
- you have to set a null reference for this parameter.

If this is your case,  just declare this parameter as an integer and set it to 0.

1) C++ prototype:

void Foo (char *str);

2) VB.NET:

Public Declare Sub Foo Lib "FooLib" (ByVal str As String)
Public Declare Sub Foo2 Lib "FooLib" Alias "Foo" ( _
            ByVal str As Integer)

Foo("Fooo")     ' sends reference to this string
Foo2(0)         ' sends null reference

[jspaarg]

I realize now that it is too general.

However, that stems from NI's usage of the term "reference".

I want a null reference to an ODBC VI.

I can create a constant by right-clicking on the input to the VI, but I do not understand what that does.

That may be all I need.

[YuGen]

This forum is titled as "Measurement Studio for.NET Languages". And you are a LabVIEW developer, aren't you? I believe you will find an answer on the forum "LabVIEW".

[jspaarg]

My bad, must have hit the wrong button.

Sorry.