why shear argument in cvinitfont() function does not work ?

	IplImage *Image=cvLoadImage("ABC.jpg");
	
	CvFont Font1;
	cvInitFont(&Font1,CV_FONT_HERSHEY_COMPLEX,1,1,0.0f,2);
<!--  when i set shear argument to 0.0f , i did not get any effect -->
	
	CvFont Font2;
	cvInitFont(&Font2,CV_FONT_HERSHEY_COMPLEX,1,1,1.0f,2);
<!-- also whean shear arrgument equal 1.0f , i did not get any effect -->
	

	cvPutText(Image,"Hello World",cvPoint(50,50),&Font1,cvScalar(255));
	cvPutText(Image,"Hello World",cvPoint(200,50),&Font2,cvScalar(255));
	
	cvNamedWindow("0",0);
	cvShowImage("0",Image);
	cvWaitKey(0);