IDirectDraw4::GetVerticalBlankStatus

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The IDirectDraw4::GetVerticalBlankStatusmethod 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::WaitForVerticalBlankmethod.

Requirements

Runs on	Versions	Declared in	Link to
Windows CE OS	2.12 or later. Version 2.12 requires DXPAK 1.0 or later.	ddraw.h	ddraw.lib