diff --git a/win/rfb_win32/BitmapInfo.h b/win/rfb_win32/BitmapInfo.h
new file mode 100644
index 0000000..6a6f0d2
--- /dev/null
+++ b/win/rfb_win32/BitmapInfo.h
@@ -0,0 +1,48 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_WIN32_BITMAP_INFO_H__
+#define __RFB_WIN32_BITMAP_INFO_H__
+
+#include <windows.h>
+#include <rdr/types.h>
+
+namespace rfb {
+  namespace win32 {
+
+    struct BitmapInfo {
+      BITMAPINFOHEADER bmiHeader;
+      union {
+        struct {
+          DWORD red;
+          DWORD green;
+          DWORD blue;
+        } mask;
+        RGBQUAD color[256];
+      };
+    };
+
+    inline void initMaxAndShift(DWORD mask, int* max, int* shift) {
+      for ((*shift) = 0; (mask & 1) == 0; (*shift)++) mask >>= 1;
+        (*max) = (rdr::U16)mask;
+    }
+
+  };
+};
+
+#endif