[Bug 18145] New: FillRect: Undocumented feature

http://bugs.winehq.org/show_bug.cgi?id=18145

Summary: FillRect: Undocumented feature
           Product: Wine
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P2
         Component: user32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=20608)
 --> (http://bugs.winehq.org/attachment.cgi?id=20608)
Test that show chess board under WinXP and gray field under wine.

I found that FillRect function have undocumented feature. It can receive 0 in
`hbrush' argument. In that case it use brush selected before by SelectObject.
I'm attached test program that can prove such behaviour.

This feature is used in some proprietary programs.