Let's just require Windows XP and IE 5.0.

direct/src/plugin_activex/stdafx.h

@@ -11,19 +11,19 @@
 // Modify the following defines if you have to target a platform prior to the ones specified below.
 // Refer to MSDN for the latest info on corresponding values for different platforms.
 #ifndef WINVER              // Allow use of features specific to Windows 95 and Windows NT 4 or later.
-#define WINVER 0x0400       // Change this to the appropriate value to target Windows 98 and Windows 2000 or later.
+#define WINVER 0x0501       // Change this to the appropriate value to target Windows XP or later.
 #endif
 
 #ifndef _WIN32_WINNT        // Allow use of features specific to Windows XP or later.
 #define _WIN32_WINNT 0x0501 // Change this to the appropriate value to target Windows 2000 or later.
 #endif
 
-#ifndef _WIN32_WINDOWS      // Allow use of features specific to Windows 98 or later.
-#define _WIN32_WINDOWS 0x0410 // Change this to the appropriate value to target Windows Me or later.
+#ifndef _WIN32_WINDOWS      // Allow use of features specific to Windows XP or later.
+#define _WIN32_WINDOWS 0x0501 // Change this to the appropriate value to target Windows Me or later.
 #endif
 
 #ifndef _WIN32_IE           // Allow use of features specific to IE 4.0 or later.
-#define _WIN32_IE 0x0400    // Change this to the appropriate value to target IE 5.0 or later.
+#define _WIN32_IE 0x0500    // Change this to the appropriate value to target IE 5.0 or later.
 #endif
 
 #define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS  // some CString constructors will be explicit