Avoid needing winver 601.

indra/llwindow/llwindowwin32.cpp

@@ -75,6 +75,27 @@ const F32	ICON_FLASH_TIME = 0.5f;
 
 extern BOOL gDebugWindowProc;
 
+#ifndef WM_DPICHANGED
+#define WM_DPICHANGED 0x02E0
+#endif
+
+#ifndef DPI_ENUMS_DECLARED
+
+typedef enum PROCESS_DPI_AWARENESS {
+	PROCESS_DPI_UNAWARE = 0,
+	PROCESS_SYSTEM_DPI_AWARE = 1,
+	PROCESS_PER_MONITOR_DPI_AWARE = 2
+} PROCESS_DPI_AWARENESS;
+
+typedef enum MONITOR_DPI_TYPE {
+	MDT_EFFECTIVE_DPI = 0,
+	MDT_ANGULAR_DPI = 1,
+	MDT_RAW_DPI = 2,
+	MDT_DEFAULT = MDT_EFFECTIVE_DPI
+} MONITOR_DPI_TYPE;
+
+#endif
+
 LPWSTR gIconResource = IDI_APPLICATION;
 
 LLW32MsgCallback gAsyncMsgCallback = NULL;