instance problem in CreateWindowEx{A,W,16}

[Mike Hearn]

On Sat, 2003-12-27 at 18:39, Peter Oberndorfer wrote:
> Hello
> Trying to run PEview.exe i found a problem.
> 
> First i create a window with  CreateWindowEx and pass 0 as instance.
> When trying to read the instance with GetWindowLong(hWnd,GWL_HINSTANCE)
> # Wine returns 0 as passed to the function.
> # Win 98 returns 0x400000 which is what GetModuleHandle( NULL ) gives me.
> 
> For the CreateWindowEx{A,W} it can easily be fixed by adding this two 
> lines at the beginning of the function:
> 
>     if (instance == 0)
>         instance = GetModuleHandleW( NULL );

Are you sure that's the right fix? Perhaps it always calls
GetModuleHandle on instance, I can't think of a reason that they'd
special case 0 like that. Do you always get back the exact value you put
in when instance != 0?

thanks -mike