I'm getting a bunch of errors with this header file i made.

I wrote an encryption scheme and instead of copy and pasting all the prototypes and such into any other program i want to use the algorithm in i decided to do the normal thing and put it in a header file.

however, i set it up the way i "thought" it was supposed to be setup and the way i've used it before but i get a bunch of errors:
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : error C2065: 'string' : undeclared identifier
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : error C2065: 'text' : undeclared identifier
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : error C2182: 'appendString' : illegal use of type 'void'
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : fatal error C1903: unable to recover from previous error(s); stopping compilation
Main.cpp
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : error C2065: 'string' : undeclared identifier
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : error C2065: 'text' : undeclared identifier
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : error C2182: 'appendString' : illegal use of type 'void'
c:\documents and settings\doug.laptop.000\my documents\visual studio 2005\projects\tdea\tdea\dea.h(3) : fatal error C1903: unable to recover from previous error(s); stopping compilation
If you guys need the source code just lemme know.


Thanks so much!