IDirectInputEffect::Initialize

The IDirectInputEffect::Initialize method initializes a DirectInputEffect object.

HRESULT Initialize(
  HINSTANCE hinst,  
  DWORD dwVersion,  
  REFGUID rguid     
);

Parameters

hinst

Instance handle to the application or DLL that is creating the DirectInputEffect object. DirectInput uses this value to determine whether the application or DLL has been certified and to establish any special behaviors that might be necessary for backward compatibility. It is an error for a DLL to pass the handle to the parent application.

dwVersion

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

rguid

Identifier of the effect with which the interface is associated. The IDirectInputDevice7::EnumEffects method can be used to determine which effect GUIDs are supported by the device.

Return Values

If the method succeeds, the return value is DI_OK.

If the method fails, the return value can be DIERR_DEVICENOTREG.

Remarks

If this method fails, the underlying object should be considered to be an indeterminate state and needs to be reinitialized before it can be subsequently used.

The IDirectInputDevice7::CreateEffect method automatically initializes the effect after creating it. Applications normally do not need to call the Initialize method.

In C++ the rguid parameter must be passed by reference; in C, which does not have pass-by-reference, it must be passed by address. The following is an example of a C++ call:

lpeff->Initialize(g_hinstDll, DIRECTINPUT_VERSION, GUID_Effect);

The following shows the same call in C:

lpeff->lpVtbl->Initialize(lpeff, g_hinstDll, 
                          DIRECTINPUT_VERSION, &GUID_Effect);

Requirements

  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.