Forgive the use of windows, but I need help !

[countzero]

http://www.newty.de/fpt/fpt.html#defi

google and you shall find

casting is casting a type to a pointer. like, you can declare the function parameter as a void pointer, then you can cast it to a specific type and use it.

int myWindozeFunction (void * groovy, int what)

if (what == 1)
int * myIntPtr = (int *) groovy;

something like this...