how do i get a message box to be able to enter info.

is i have made a tile editer and need a message box to come up so i can enter the name of the level to save.

You could look into:

int file_select_ex(const char *message, char *path, const char *ext, int size, int w, int h);

spawning a windows file selector is easy too.
win32::GetOpenFileName()