LPDDHAL_WAITFORVERTICALBLANK (Compact 2013)

3/26/2014

This callback function helps the application synchronize itself with the vertical blanking interval (VBI).

Syntax

typedef DWORD (* LPDDHAL_WAITFORVERTICALBLANK)(
  LPDDHAL_WAITFORVERTICALBLANKDATA lpwfvbd
);

Parameters

• lpwfvbd
  [in, out] Pointer to a DDHAL_WAITFORVERTICALBLANKDATA structure that contains the vertical blank information.

Return Value

Returns one of the following values:

• DDHAL_DRIVER_HANDLED
  The request was handled although a specific action may not have been taken.

• DDHAL_DRIVER_NOTHANDLED
  The request was not handled or processed in any way.

Note

For a complete list of the DDHAL callback return values, see DDHAL Callback Return Values.

Remarks

An example implementation of this callback function, WaitForVerticalBlank32, can be found in the IGS sample driver source code.

Requirements

Header	ddrawi.h
Library	Developer Implemented

See Also

Reference

DirectDraw Display Driver Callback Functions
DDHAL_WAITFORVERTICALBLANKDATA
DDHAL Callback Return Values