[Bug 42251] New: VirtualDub: empty preview when CSMT is enabled

https://bugs.winehq.org/show_bug.cgi?id=42251

Bug ID: 42251
           Summary: VirtualDub: empty preview when CSMT is enabled
           Product: Wine-staging
           Version: 2.0-rc5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail]
      Distribution: ArchLinux

Created attachment 56934
  --> https://bugs.winehq.org/attachment.cgi?id=56934
Screenshot

When CSMT is enabled, the preview panes in VirtualDub are empty which makes it
impossible to see what you're doing. See the attached screenshot.

Strangely enough, when switching from VirtualDub to another window the preview
appears, but as soon as the VirtualDub window is active again, the preview
becomes empty.

Arch Linux x64
64-bit wine prefix
32-bit VirtualDub 1.10.4