IRenderingControl::GetContrast (Compact 7)

  • Article

3/12/2014

This method returns the contrast setting of this RenderingControl instance.

Syntax

virtual DWORD GetContrast(
  unsigned short* pContrast
) = 0;

Parameters

  • pContrast
    [in, out] Contrast setting of this RenderingControl instance. Corresponds to the Contrast state variable.

Return Value

Custom implementations can return appropriate error codes. Should return SUCCESS_AV if the method succeeds. Otherwise, should return an error code defined in WinError.h or UPnP.h, or one of the UPnP AV-specific return values specified in UPnPAVError, especially the following errors documented for this action in the RenderingControl DCP documentation:

  • ERROR_AV_UPNP_ACTION_FAILED
  • ERROR_AV_UPNP_RC_INVALID_INSTANCE_ID

Remarks

This method corresponds to the RenderingControl service's GetContrast action.

The RenderingControl service does not require that this method be implemented. The IRenderingControlImpl class therefore overrides this method to return ERROR_AV_UPNP_INVALID_ACTION.

For more information about the actions in the RenderingControl service, see UPnP Forum AV Web site.

Requirements

Header

av_upnp.h

Library

Av_upnp.lib

See Also

Reference

IRenderingControl
IRenderingControlImpl
UPnPAVError