IDirectDraw4::GetVerticalBlankStatus

The IDirectDraw4::GetVerticalBlankStatus method retrieves the status of the vertical blank.

HRESULT GetVerticalBlankStatus(
  LPBOOL lpbIsInVB  
);

Parameters

lpbIsInVB
Address of the variable that will be filled with the status of the vertical blank. This parameter is TRUE if a vertical blank is occurring, and FALSE otherwise.

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

Remarks

To synchronize with the vertical blank, use the IDirectDraw4::WaitForVerticalBlank method.

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 ddraw.h.
  Import Library: Use ddraw.lib.

See Also

IDirectDraw4::GetScanLine, IDirectDraw4::WaitForVerticalBlank