What is the differance between for ex. DevmodeA and devmodeW. What does the A and W mean? Wich should I use? Thanks in advance /sb

A is for ascii characters. W is for wide characters. It''s for dealing with unicode, its declared something like this:

typedef struct
{
stuff
}DevmodeA;
typedef struct
{
wide character stuff
}DevmodeW;

#ifdef UNICODE
typedef DevmodeW Devmode;
#else
typedef DevmodeA Devmode;
#endif

which means all you have to do is use Devmode and windows will take care of the rest while compiling.