IDirectDrawSurface7::ChangeUniquenessValue method

Manually updates the uniqueness value for this surface.

Syntax


HRESULT ChangeUniquenessValue();

Parameters

This method has no parameters.

Return value

If the method succeeds, the return value is DD_OK.

If it fails, the method can return one of the following error values:

  • DDERR_EXCEPTION
  • DDERR_INVALIDOBJECT
  • DDERR_INVALIDPARAMS

Remarks

DirectDraw automatically updates uniqueness values whenever the contents of a surface change.

You must use LoadLibrary to explicitly link to Ddraw.dll and then use GetProcAddress to access the ChangeUniquenessValue method.

Requirements

Header

Ddraw.h

Library

Ddraw.lib

DLL

Ddraw.dll

See also

IDirectDrawSurface7

 

 

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