This section contains information about the structures used with Microsoft?DirectInput?
The memory for all Microsoft DirectX?structures must be initialized to 0 before use. In addition, all structures that contain a
member should set the member to the size of the structure, in bytes, before use. The following example performs these tasks on a common structure, DIDEVCAPS
DIDEVCAPS didevcaps; // Can't use this yet
didevcaps.dwSize = sizeof(didevcaps);
// Now the structure Can be used.