Battle.net installer now working. It crashes when the login page loads, but that seems to be fixed in upcoming version and the controls did read.

menu_bridge.h

@@ -21,6 +21,14 @@
 #define WINE_ACCESS_TEXT_SCINTILLA 1
 #define WINE_ACCESS_TEXT_READONLY 2
 #define WINE_ACCESS_NOTIFICATION_TAG 0x57414e31
+#define WINE_ACCESS_BOOTSTRAPPER_TAG 0x57414231
+
+typedef struct WineAccessBootstrapperState {
+  ULONGLONG owner;
+  ULONGLONG tick;
+  UINT state;
+  WCHAR name[1024];
+} WineAccessBootstrapperState;
 
 typedef struct WineAccessNotificationEvent {
   DWORD process;