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4/8/2010

This method retrieves the status of the vertical blank.

Syntax 

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 Value

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

For more information on these error codes see DirectDraw Return Values.

Remarks

To synchronize with the vertical blank, use the IDirectDraw::WaitForVerticalBlankmethod.

Requirements

Header ddraw.h
Library ddraw.lib
Windows Embedded CE Windows Embedded CE 6.0 and later
Windows Mobile Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later

See Also