The string fields in PROPSHEETPAGEA should be ANSI strings.

diff --git a/include/prsht.h b/include/prsht.h
index ad2e3cd..aceaa72 100644
--- a/include/prsht.h
+++ b/include/prsht.h
@@ -54,8 +54,8 @@
     LPARAM             lParam;
     LPFNPSPCALLBACKA pfnCallback;
     UINT*            pcRefParent;
-    LPCWSTR            pszHeaderTitle;
-    LPCWSTR            pszHeaderSubTitle;
+    LPCSTR             pszHeaderTitle;
+    LPCSTR             pszHeaderSubTitle;
 } PROPSHEETPAGEA, *LPPROPSHEETPAGEA;
 
 typedef const PROPSHEETPAGEA *LPCPROPSHEETPAGEA;