LOGFONT如何设置字体大小

OpenGL超级宝典（第二版）第17章例子Text3D中，如何设置字体大小，使输出字体可以随意控制大小，我试过改变LOGFONT的lfHeight和lfWidth都没用，该怎样改呢？谢谢！
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void RenderScene(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Blue 3D Text
glColor3ub(0, 0, 255);    glPushMatrix();
glListBase(nFontList);
glCallLists (6, GL_UNSIGNED_BYTE, "OpenGL"); 
    glPopMatrix();
}
void SetupRC(HDC hDC)
{
// Setup the Font characteristics
HFONT hFont;
GLYPHMETRICSFLOAT agmf[128]; // Throw away
LOGFONT logfont; logfont.lfHeight = -10;//我试图修改处，无效
logfont.lfWidth = 0;//我试图修改处，无效
logfont.lfEscapement = 0;
logfont.lfOrientation = 0;
logfont.lfWeight = FW_BOLD;
logfont.lfItalic = FALSE;
logfont.lfUnderline = FALSE;
logfont.lfStrikeOut = FALSE;
logfont.lfCharSet = ANSI_CHARSET;
logfont.lfOutPrecision = OUT_DEFAULT_PRECIS;
logfont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
logfont.lfQuality = DEFAULT_QUALITY;
logfont.lfPitchAndFamily = DEFAULT_PITCH;
strcpy(logfont.lfFaceName,"Arial"); // Create the font and display list
hFont = CreateFontIndirect(&logfont);
SelectObject (hDC, hFont); 
//create display lists for glyphs 0 through 128 with 0.1 extrusion 
// and default deviation. The display list numbering starts at 1000 
// (it could be any number). 
nFontList = glGenLists(128);
wglUseFontOutlines(hDC, 0, 128, nFontList, 0.0f, 0.5f, 
WGL_FONT_POLYGONS, agmf);  DeleteObject(hFont); glEnable(GL_DEPTH_TEST); // Hidden surface removal
glEnable(GL_COLOR_MATERIAL); glClearColor(0.0f, 0.0f, 0.0f, 1.0f ); glEnable(GL_LIGHTING);
glLightfv(GL_LIGHT0,GL_AMBIENT,whiteLight);
glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);
glLightfv(GL_LIGHT0,GL_SPECULAR,specular);
glLightfv(GL_LIGHT0,GL_POSITION,lightPos);
glEnable(GL_LIGHT0);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
glMaterialfv(GL_FRONT, GL_SPECULAR,specular);
glMateriali(GL_FRONT,GL_SHININESS,128);
}