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Ramon unch lower with mmb fix#138

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stefansundin:masterfrom
RamonUnch:RamonUnch-LowerWithMMBFix
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Ramon unch lower with mmb fix#138
RamonUnch wants to merge 4 commits into
stefansundin:masterfrom
RamonUnch:RamonUnch-LowerWithMMBFix

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On some windows such as Sumatra PDF, or Office 2010, by avoiding to get the ancestor window before the WM_NCHITTEST message.
SumatraPDF discussion: sumatrapdfreader/sumatrapdf#1979
I had to add the HitTestTimeout() function that checks the response of the WM_NCHITTEST on the pointed NChwnd, if it returns HTTRANSPARENT, then I check the parent window until there is a parent or the HitTest returned something different than Transparent.

PS: I also added the HTHELP (small interrogation dot [?] button in the title bar) to the area that lower the window.

RamonUnch added 4 commits May 13, 2021 09:14
On some windows such as Sumatra PDF, or Office 2010, by avoiding to get the ancestor window before the WM_NCHITTEST message.
SumatraPDF discussion: sumatrapdfreader/sumatrapdf#1979
I had to add the HitTestTimeout() function that checks the response of the WM_NCHITTEST on the pointed hwnd, if it returns HTTRANSPARENT, then I check the parent window until there is a parent or the HitTest returned something different than Transparent.
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