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IDirectDraw::EnumDisplayModes

  • Artigo

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method enumerates all of the display modes the hardware exposes through the DirectDraw object that are compatible with a provided surface description.

Syntax

HRESULT EnumDisplayModes( 
  DWORD dwFlags, 
  LPDDSURFACEDESC lpDDSurfaceDesc, 
  LPVOID lpContext, 
  LPDDENUMMODESCALLBACK lpEnumModesCallback
);

Parameters

  • dwFlags
    The following table shows the possible flags.

    Flag Description

    DDEDM_REFRESHRATES

    This flag numerates modes with different refresh rates.

    IDirectDraw::EnumDisplayModes guarantees that a mode is enumerated only once.

    This flag specifies whether the refresh rate is taken into account when determining if a mode is unique.

    It is not possible to change an adapter's refresh rate in Windows Embedded CE.

    DDEDM_STANDARDVGAMODES

    This flag is not supported in Windows Embedded CE.

  • lpDDSurfaceDesc
    Address of a DDSURFACEDESC structure that will be checked against available modes.

    If the value of this parameter is NULL, all modes are enumerated.

  • lpContext
    Address of an application-defined structure that will be passed to each enumeration member.
  • lpEnumModesCallback
    Address of the EnumModesCallback function that the enumeration procedure will call every time a match is found.

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

This method enumerates the dwRefreshRate member of the DDSURFACEDESC structure; the IDirectDraw::EnumDisplayModes method does not contain this capability.

If you use the IDirectDraw::SetDisplayMode method to set the refresh rate of a new mode, you must use IDirectDraw::EnumDisplayModes to enumerate the dwRefreshRate member.

Windows Embedded CE does not support DDEDM STANDARDVGAMODES.

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

Reference

IDirectDraw::GetDisplayMode
IDirectDraw::SetDisplayMode
IDirectDraw::RestoreDisplayMode