You can do it by using a union[^] thus:
union MyDef
{
DWORD W1;
struct bits
{
DWORD B1 : 8;
DWORD B2 : 8;
DWORD B3 : 8;
DWORD B4 : 8;
};
};
which maps W1 to the same memory space as the four byte fields. You can now refer to the whole DWORD as W1 of the union structure.
