IDirectDraw2::GetVerticalBlankStatus

The IDirectDraw2::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:

Remarks

To synchronize with the vertical blank, use the IDirectDraw2::WaitForVerticalBlank method.

QuickInfo

  Windows NT: Use version 4.0 or later.
  Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
  Windows CE: Unsupported.
  Header: Declared in ddraw.h.
  Import Library: Use ddraw.lib.

See Also

IDirectDraw2::GetScanLine, IDirectDraw2::WaitForVerticalBlank