DDHAL_WAITFORVERTICALBLANKDATA (Windows Embedded CE 6.0)

1/6/2010

This structure contains the vertical blank information. This structure passes the information to the DirectDraw hardware abstraction layer (DDHAL) LPDDHAL_WAITFORVERTICALBLANK callback function.

Syntax

typedef struct _DDHAL_WAITFORVERTICALBLANKDATA {
  LPDDRAWI_DIRECTDRAW_GBL lpDD;
  DWORD dwFlags;
  DWORD bIsInVB;
  HRESULT ddRVal;
} DDHAL_WAITFORVERTICALBLANKDATA;

Members

• lpDD
  Pointer to the DDRAWI_DIRECTDRAW_GBL structure that represents the DirectDraw object.

• dwFlags
  Indicates how to wait for the vertical blank.

  The following table shows the possible values.

  Flag	Description
  DDWAITVB_BLOCKBEGIN	Returns when the vertical blank interval begins.
  DDWAITVB_BLOCKBEGINEVENT	Sets up an event to trigger when the vertical blank begins. This flag is not currently supported.
  DDWAITVB_BLOCKEND	Returns when the vertical blank interval ends and display begins.
  DDWAITVB_I_TESTVB	Sets the flag to query if a vertical blank is in progress.

• bIsInVB
  Indicates the status of the vertical blank.

• ddRVal
  Passes the DirectDraw return values.

Requirements

See Also

Reference

LPDDHAL_WAITFORVERTICALBLANK
DDRAWI_DIRECTDRAW_GBL

Concepts

DirectDraw Display Driver Structures