[Bug 50042] Wine fails to execute .NET C# "ShowDialog()"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50042

Nikolay Sivov <bunglehead at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #5 from Nikolay Sivov <bunglehead at gmail.com> ---
There is an explicit throw in WinForms Core code for this:

---
        private void SetFileTypes(IFileDialog dialog)
        {
            COMDLG_FILTERSPEC[] filterItems = FilterItems;
            HRESULT hr = dialog.SetFileTypes((uint)filterItems.Length,
filterItems);
            if (!hr.Succeeded())
            {
                throw Marshal.GetExceptionForHR((int)hr);
            }
---

SetFileTypes fails because filterItems is null, and it should according to
tests. 

Running with .NET winforms I get this:

0420:trace:commdlg:IFileDialog2_fnSetFileTypes 00CF3A48 (0, FFFFFFFF)

Which returns S_OK in Wine, because of 0 first argument while second is
non-zero.

I don't know if it points to difference between managed part of WinForms Core
vs WinForms .NET, or if it's about marshalling logic differences in mono vs
.NET runtime.

Confirming.

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