- Fix a typo in TBSAVEPARAMS A/W declaration.
- Use 16 bit Unicode constants for wc strings.
- Make some string constants available as Unicode.

diff --git a/include/prsht.h b/include/prsht.h
index cf8d209..02c2dda 100644
--- a/include/prsht.h
+++ b/include/prsht.h
@@ -16,7 +16,8 @@
 
 
 #define WC_PROPSHEETA      "SysPropertySheet"
-#define WC_PROPSHEETW      L"SysPropertySheet"
+static const WCHAR WC_PROPSHEETW[] = { 'S','y','s',
+  'P','r','o','p','e','r','t','y','S','h','e','e','t',0 };
 #define WC_PROPSHEET         WINELIB_NAME_AW(WC_PROPSHEET)
 
 struct _PROPSHEETPAGEA;  /** need to forward declare those structs **/