IDirectInput8::CreateDevice Method

Articolo
09/10/2011

Creates and initializes an instance of a device based on a given globally unique identifier (GUID), and obtains an IDirectInputDevice8 Interface interface.

Syntax

HRESULT CreateDevice(
         REFGUID rguid,
         LPDIRECTINPUTDEVICE * lplpDirectInputDevice,
         LPUNKNOWN pUnkOuter
)

Parameters

rguid
Reference to the GUID for the desired input device (see Remarks). The GUID is retrieved through the IDirectInput8::EnumDevices method, or it can be one of the predefined GUIDs listed below. For the following GUID values to be valid, your application must define INITGUID before all other preprocessor directives at the beginning of the source file, or link to Dxguid.lib.
- GUID_SysKeyboard
  The default system keyboard.
- GUID_SysMouse
  The default system mouse.
lplpDirectInputDevice
Address of a variable to receive the IDirectInputDevice8 Interface interface pointer if successful.
pUnkOuter
Address of the controlling object's IUnknown interface for COM aggregation, or NULL if the interface is not aggregated. Most calling applications pass NULL.

Return Value

If the method succeeds, the return value is DI_OK. If the method fails, the return value can be one of the following: DIERR_DEVICENOTREG, DIERR_INVALIDPARAM, DIERR_NOINTERFACE, DIERR_NOTINITIALIZED, DIERR_OUTOFMEMORY.

Remarks

Calling this method with pUnkOuter = NULL is equivalent to creating the object by CoCreateInstance (&CLSID_DirectInputDevice, NULL, CLSCTX_INPROC_SERVER, riid, lplpDirectInputDevice) and then initializing it with Initialize.

Calling this method with pUnkOuter != NULL is equivalent to creating the object by CoCreateInstance (&CLSID_DirectInputDevice, punkOuter, CLSCTX_INPROC_SERVER, &IID_IUnknown, lplpDirectInputDevice). The aggregated object must be initialized manually.

Requirements

Header: Declared in dinput.h.

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