error C2039: 'hwnd' : is not a member of QPalette

[weixj2003ld]

I use the follow code to set the background color of a a QLabel:

QColor colorrgb(x*255,y*255,z*255);
	QPalette plalette;		
	plalette.setColor(QPalette::Window,colorrgb);
	colorlabelreal->setAutoFillBackground(true);
	colorlabelreal->setPalette(plalette);

QColor colorrgb(x*255,y*255,z*255);
	QPalette plalette;		
	plalette.setColor(QPalette::Window,colorrgb);
	colorlabelreal->setAutoFillBackground(true);
	colorlabelreal->setPalette(plalette);

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but the follow error occur:
error C2039: 'hwnd' : is not a member of QPalette
error C2275: 'HWND' : illegal use of this type as an expression