Multi-file project problem with Visual D

[Mike via Digitalmars-d-learn]

On Monday, 2 June 2014 at 01:01:22 UTC, Mike wrote:
> I've created a small Windows based program using a win32 
> library I found online.   That part is working just fine.
>
> I've also created a second file (called util.d) and within it 
> defined a class called MyData (with a member function called 
> Read()).
>
> Within my main program I instantiate and try to call the Read() 
> method.  No errors are generated but nothing gets called.   
> Right now the Read() method just does a throw so I know 
> something is going on.
>
> What am I missing here?   I would think the compiler would 
> generate an error if something was missing.
>
> winmain.d:
> ---------------------------------
> extern(Windows)
> LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM 
> lParam)
> {
>
>     switch (message)
>     {
>         case WM_CREATE:
> 	    f.Read() ;
>             return 0 ;
>
>  /* ... */
>
> } // WndProc
>
>
>
> util.d:
> ----------------------------------
>
> class MyData {
> public:
>     void Read() {
>         throw new Exception("No!", __FILE__, __LINE__) ;
>     } // void Read()
> } // class Data


Doing more testing and debugging found that the value of the 
instance is 0, which leads me to believe something is happening 
with the instantiation.   Back to the books I suppose.