Macros

This section describes the following macros used in DirectInput:

• DIDFT_GETINSTANCE
• DIDFT_GETTYPE
• DIEFT_GETTYPE
• DISEQUENCE_COMPARE
• GET_DIDEVICE_SUBTYPE
• GET_DIDEVICE_TYPE
• DIMAKEUSAGEDWORD

Dinput.h also defines macros for C calls to all the methods of the IDirectInput and IDirectInputDevice interfaces. These macros eliminate the need for pointers to method tables. For example, here is a C call to the IDirectInputDevice::Release method:

lpdid->lpVtbl->Release(lpdid));
 

The equivalent macro call looks like this:

IDirectInputDevice_Release(lpdid);
 

All these macros take the same parameters as the method calls themselves.