### IDirectDraw2::GetCaps

The IDirectDraw2::GetCaps method fills in the capabilities of the device driver for the hardware and the hardware-emulation layer (HEL).

HRESULT GetCaps(

LPDDCAPS lpDDDriverCaps,

LPDDCAPS lpDDHELCaps

);

##### Parameters

lpDDDriverCaps
  Address of a DDCAPS structure that will be filled with the capabilities of the hardware, as reported by the device driver. Set this parameter to NULL if device driver capabilities are not to be retrieved.
lpDDHELCaps
  Address of a DDCAPS structure that will be filled with the capabilities of the HEL. Set this parameter to NULL if HEL capabilities are not to be retrieved.

##### Return Values

If the method succeeds, the return value is DD_OK.

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

DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS

You can only set one of the two parameters to NULL to exclude it. If you set both to NULL the method will fail, returning DDERR_INVALIDPARAMS.