this is the error... i tried all...Code:c:\documents and settings\waalwijk\mijn documenten\visual studio 2005\projects\sdk special\sdk special\sdk special.cpp(6) : error C2664: 'MessageBoxA' : cannot convert parameter 2 from 'const wchar_t [22]' to 'LPCSTR' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast