A ")" is missing after cpuspeed10.

Replacing

time, time * 1000 / cpuspeed10;

with

time, time * 1000 / cpuspeed10);

Replacing:

if ( ( (ord<pExport->Base) || (ord>pExport->NumberOfFunctins) )

with

if ( ( (ord<pExport->Base) || ((ord - pExport->Base)>=pExport->NumberOfFunctins) )

The GRE/DDI interface does not support elliptical curves like circle, art, or ellipse.

should be:

The GRE/DDI interface does not support elliptical curves like circle, arc, or ellipse.

Nesting makes sure that DrvStartDoc, DrvEndDoc, DrvStartPage, and DrvSnedPage are called...

should be:

Nesting makes sure that DrvStartDoc, DrvEndDoc, DrvStartPage, and DrvSendPage are called...

Use mode pointers are accessible from kernel mode address space, ...

should be:

User mode pointers are accessible from kernel mode address space, ...

Typo at the bottom of the page.

Replacing 0x3pe0a with 0x9e0a.

... examine crush dumps ...

should be:

.. .examine crash dumps ...

miximum should have been maximum.

Second paragraph. minisecond should have been millisecond.

Second paragraph, BegninPaint should have been BeginPaint.

lpdd->>lpVtbl should have been lpdd->lpVtbl

Third paragraph. If an exact match can be found should have been If an extact match can not be found.

DT_RASCAMETA should have been DT_RASCAMERA

Last bullet. time to down load should have been time to download

Penultimate paragraph. GetRandmRgn should have been GetRandomRgn, two places.

Function AngleArcToBezier only works when rx equals ry.

Here is a fix:

BOOL AngleArcToBezier(HDC hDC, int x0, int y0, int rx, int ry, 
                      double startangle, double sweepangle)
{
    double XY[8];
    POINT P[4];

    // Compute bezier curve for arc centered along y axis
    // Anticlockwise: (0,-B), (x,-y), (x,y), (0,B) 
    double B = ry * sin(sweepangle/2);
    double C = rx * cos(sweepangle/2);
    double A = rx 1 - C;

    double X = A*4/3;
    double Y = B - X * (1-A)/B;

    XY[0] =   C;
    XY[1] = - B;
    XY[2] =   C+X;
    XY[3] = - Y;
    XY[4] =   C+X;
    XY[5] =   Y;
    XY[6] =   C;
    XY[7] =   B;

    // rotate to the original angle
    double s = sin(startangle + sweepangle/2);
    double c = cos(startangle + sweepangle/2);

    for (int i=0; i<4; i++)
    {
        P[i].x = x0 + (int) ( (XY[i*2] * c - XY[i*2+1] * s) * rx );
        P[i].y = y0 + (int) ( (XY[i*2] * s + XY[i*2+1] * c) * ry );
    }

    return PolyBezier(hDC, P, 4);
}

Penultimate paragraph. Note that area file functions should have been Note that area fill functions

Penultimate paragraph. SetDCPenColor should have been SetDCBrushColor.

First sentence. Hatches brushes divide should have been Hatch brushes divide

Second paragraph. PaltBlt should have been PatBlt.

Second paragraph. PolyPaltBlt should have been PolyPatBlt.

CombineRgn(HRGN hrgnDest, HRGN hrgnSrc, hrgnSrc2, int fnCombineMode);

should have been:

CombineRgn(HRGN hrgnDest, HRGN hrgnSrc, HRGN hrgnSrc2, int fnCombineMode);

166,777,216 should have been 16,777,216, two places.

(width * bitcount + 31)/32 should have been (width * bitcount + 31)/32 * 4

FM_FONTCARE should have been FW_DONTCARE.

FM_NORMAL should have been FW_NORMAL.

GetTextTextentPoint32 should have been GetTextExtentPoint32

LPTSTR lpClass should have been LPSTR lpClass

nMaxExent should have been nMaxExtent

GCP_USERKING should have been GCP_USEKERNING