Add the msidefs.h header.
diff --git a/include/msidefs.h b/include/msidefs.h
new file mode 100644
index 0000000..e5543ef
--- /dev/null
+++ b/include/msidefs.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2005 Mike McCormack
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __WINE_MSIDEFS_H
+#define __WINE_MSIDEFS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum msidbDialogAttributes {
+ msidbDialogAttributesVisible = 0x00000001,
+ msidbDialogAttributesModal = 0x00000002,
+ msidbDialogAttributesMinimize = 0x00000004,
+ msidbDialogAttributesSysModal = 0x00000008,
+ msidbDialogAttributesKeepModeless = 0x00000010,
+ msidbDialogAttributesTrackDiskSpace = 0x00000020,
+ msidbDialogAttributesUseCustomPalette = 0x00000040,
+ msidbDialogAttributesRTLRO = 0x00000080,
+ msidbDialogAttributesRightAligned = 0x00000100,
+ msidbDialogAttributesLeftScroll = 0x00000200,
+ msidbDialogAttributesBidi = 0x00000380,
+ msidbDialogAttributesError = 0x00010000
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __WINE_MSIDEFS_H */
