Re: Add support for MDICREATESTRUCT conversion for 16-bit windows

[Alexandre Julliard]

Dmitry Timoshkov  writes:
> I've got a bug report that after my MDI rewrite some 16-bit MDI app
> stopped to work. That's not a surprise at all. The surprise is that
> STRUCT32_xxx conversion helpers didn't cope correctly with 16-bit
> hInstance and actually that caused a 16-bit app to misbehave in
> the first place. I had to use GetExePtr() because MapHModuleSL checks
> for NE_FFLAGS_WIN32 (why?) and bails out.

Using GetExePtr is going to return the wrong instance once we get back
to 16-bit code. The instance handles are actually not supposed to be
converted at all, we just expand the 16-bit ones to 32-bit. What was
the problem with your 16-bit app?

Add support for MDICREATESTRUCT conversion for 16-bit windows

[Dmitry Timoshkov]

"Alexandre Julliard"  wrote:
> Using GetExePtr is going to return the wrong instance once we get back
> to 16-bit code. The instance handles are actually not supposed to be
> converted at all, we just expand the 16-bit ones to 32-bit. What was
> the problem with your 16-bit app?

The app sends WM_MDICREATE message which fails with:
win.c,create_window_handle(): error 6 creating window

The WM_MDICREATE message gets translated from 16-bit to Ansi,
and the following CreateWindowEx calls fails due to bad hInstance
passed to create_window() server call.