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This method retrieves the status of the vertical blank.
HRESULT GetVerticalBlankStatus(LPBOOLlpbIsInVB);
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.
Requirements
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header: Ddraw.h.
Link Library: Ddraw.lib.
See Also
IDirectDraw4::GetScanLine | IDirectDraw4::WaitForVerticalBlank
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