-int WINAPI ToAscii(UINT,UINT,PBYTE,LPWORD,UINT);
-int WINAPI ToAsciiEx(UINT,UINT,PBYTE,LPWORD,UINT,HKL);
-int WINAPI ToUnicode(UINT,UINT,PBYTE,LPWSTR,int,UINT);
-int WINAPI ToUnicodeEx(UINT,UINT,PBYTE,LPWSTR,int,UINT,HKL);
+int WINAPI ToAscii(UINT,UINT,CONST PBYTE,LPWORD,UINT);
+int WINAPI ToAsciiEx(UINT,UINT,CONST PBYTE,LPWORD,UINT,HKL);
+int WINAPI ToUnicode(UINT,UINT,CONST PBYTE,LPWSTR,int,UINT);
+int WINAPI ToUnicodeEx(UINT,UINT,CONST PBYTE,LPWSTR,int,UINT,HKL);