DirectInputCreate

The DirectInputCreate function creates a DirectInput object that supports the IDirectInput COM interface.

HRESULT WINAPI DirectInputCreate(
  HINSTANCE hinst,                  
  DWORD dwVersion,                  
  LPDIRECTINPUT * lplpDirectInput,  
  LPUNKNOWN punkOuter               
);
 

Parameters

hinst

Instance handle to the application or DLL that is creating the DirectInput object. DirectInput uses this value to determine whether the application or DLL has been certified and to establish any special behaviors that may be necessary for backwards compatibility.

It is an error for a DLL to pass the handle to the parent application. For example, an ActiveX control embedded in a Web page that uses DirectInput must pass its own instance handle and not the handle to the web browser. This ensures that DirectInput recognizes the control and can enable any special behaviors that may be necessary.

dwVersion

Version number of DirectInput for which the application is designed. This value will normally be DIRECTINPUT_VERSION. Passing the version number of a previous version will cause DirectInput to emulate that version. For more information, see Designing for Previous Versions of DirectInput.

lplpDirectInput

Address of a variable to receive a valid IDirectInput interface pointer if the call succeeds.

punkOuter

Pointer to the address of the controlling object's IUnknown interface for COM aggregation, or NULL if the interface is not aggregated. Most callers will pass NULL. If aggregation is requested, the object returned in *lplpDirectInput will be a pointer to the IUnknown rather than an IDirectInput interface, as required by COM aggregation.

Return Values

If the function succeeds, the return value is DI_OK.

If the function fails, the return value may be one of the following error values:

Remarks

Calling this function with punkOuter = NULL is equivalent to creating the object through CoCreateInstance(&CLSID_DirectInput, punkOuter, CLSCTX_INPROC_SERVER, &IID_IDirectInput, lplpDirectInput), then initializing it with Initialize.

Calling this function with punkOuter != NULL is equivalent to creating the object through CoCreateInstance(&CLSID_DirectInput, punkOuter, CLSCTX_INPROC_SERVER, &IID_IUnknown, lplpDirectInput). The aggregated object must be initialized manually.

There are separate ANSI and Unicode versions of this service. The ANSI version creates an object that supports the IDirectInputA interface, whereas the Unicode version creates an object that supports the IDirectInputW interface. As with other system services that are sensitive to character set issues, macros in the header file map DirectInputCreate to the appropriate character set variation.

QuickInfo

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dinput.h.
  Import Library: Use dinput.lib.