some windows dwm api calls to play with

diff --git a/basis/windows/dwmapi/authors.txt b/basis/windows/dwmapi/authors.txt
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+Joe Groff

diff --git a/basis/windows/dwmapi/dwmapi.factor b/basis/windows/dwmapi/dwmapi.factor
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+++ b/basis/windows/dwmapi/dwmapi.factor
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+! (c)2009 Joe Groff bsd license
+USING: alien.c-types alien.libraries alien.syntax classes.struct windows.types ;
+IN: windows.dwmapi
+
+STRUCT: MARGINS
+    { cxLeftWidth    int }
+    { cxRightWidth   int }
+    { cyTopHeight    int }
+    { cyBottomHeight int } ;
+
+STRUCT: DWM_BLURBEHIND
+    { dwFlags                DWORD   }
+    { fEnable                BOOL    }
+    { hRgnBlur               HANDLE  }
+    { fTransitionOnMaximized BOOL    } ;
+
+: <MARGINS> ( l r t b -- MARGINS )
+    MARGINS <struct-boa> ; inline
+
+: full-window-margins ( -- MARGINS )
+    -1 -1 -1 -1 <MARGINS> ; inline
+
+<< "dwmapi" "dwmapi.dll" "stdcall" add-library >>
+
+LIBRARY: dwmapi
+
+FUNCTION: HRESULT DwmExtendFrameIntoClientArea ( HWND hWnd, MARGINS* pMarInset ) ;
+FUNCTION: HRESULT DwmEnableBlurBehindWindow ( HWND hWnd, DWM_BLURBEHIND* pBlurBehind ) ;

diff --git a/basis/windows/dwmapi/summary.txt b/basis/windows/dwmapi/summary.txt
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+Windows Vista Desktop Window Manager API functions

diff --git a/basis/windows/dwmapi/tags.txt b/basis/windows/dwmapi/tags.txt
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+windows
+unportable