IDL Import

[Sawamu]

Hi,

I have an IDL file with this structure inside:

typedef union abc
{
int Rogerio;
LPWSTR valString;
} _ABC;

When I generate the type library and make a reference in a vb.net project I cannot see the union members. But if I don't use the LPWSTR valString item, it appears with no problem.

So my question is: why using LPWSTR in unions make the whole union members not accessible?

Thanks!

[Pirate]

You might need to ask C++ guys why !

[Sawamu]

Hi,

I've found a way:

It is possible to declare the variable as a wchar_t * .
The vb.net see the variable as a System.IntPtr pointer.

So, now it is necessary only to read the string from the memory pointer. This can be done by : Marshal.PtrToStringAuto(memoryAddress).

The final code will be like this:

typedef union abc
{
int a;
wchar_t * b;
} _abc;

the vb code:

dim x as _abc

' Reading the data from memory
Dim MyString As String = Marshal.PtrToStringAuto(x.b)

That is it!