Printer output mirrored!

[Bajanine]

I am using VC++.net and I am printing to a networked HP882c.

I have the following code that prints a simple scaled quadrilateral to my printer but the output is mirrored horizontally!

What have I done wrong?

HDC getDefaultPrinterDC()
{
	// Initialize GDI+.
	GdiplusStartupInput gdiplusStartupInput;
	ULONG_PTR gdiplusToken;
	GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
	DOCINFO docInfo;
	ZeroMemory(&docInfo, sizeof(docInfo));
	docInfo.cbSize = sizeof(docInfo);
	docInfo.lpszDocName = "GdiplusPrint";
   
	// Create a PRINTDLG structure, and initialize the appropriate fields.
	PRINTDLG printDlg;
	ZeroMemory(&printDlg, sizeof(printDlg));
	printDlg.lStructSize = sizeof(printDlg);
	printDlg.Flags = PD_RETURNDC;
   
	// Display a print dialog box.
	if(!PrintDlg(&printDlg))
	{
		// This should be a messagebox...
		printf("Failure\n");
	}
	else
	{
		// Now that PrintDlg has returned, a device context handle
		// for the chosen printer is in printDlg->hDC.
	  
		StartDoc(printDlg.hDC, &docInfo);
		StartPage(printDlg.hDC);
		Graphics* graphics = new Graphics(printDlg.hDC);
		//Pen* pen = new Pen(Color(255, 0, 0, 0));

		///////////////////////////////////////
		// Begin centering output on printer. //
		///////////////////////////////////////
		int iWidth = GetDeviceCaps(printDlg.hDC,HORZSIZE); // returns full screen in mm.
		int iHeight = GetDeviceCaps(printDlg.hDC,VERTSIZE); // returns full screen in mm.
		int iHorzRes = GetDeviceCaps(printDlg.hDC,HORZRES); // returns pixel width for printable area.
		int iVertRes = GetDeviceCaps(printDlg.hDC,VERTRES); // returns pixel Height for printable area.
		int iPixelsPerInchX = GetDeviceCaps(printDlg.hDC,LOGPIXELSX);
		int iPixelsPerInchY = GetDeviceCaps(printDlg.hDC,LOGPIXELSY);
		ScreenWidthInInches = (GetDeviceCaps(printDlg.hDC,HORZRES) / GetDeviceCaps(printDlg.hDC,LOGPIXELSX) );
		ScreenHeightInInches = (GetDeviceCaps(printDlg.hDC,VERTRES) / GetDeviceCaps(printDlg.hDC,LOGPIXELSY) );
		//		ratio =			pixels/full screen pixels * full screen in mm /(mm/in)
		double xRatio = ( (GetDeviceCaps(printDlg.hDC,HORZRES) / GetDeviceCaps(printDlg.hDC,LOGPIXELSX) ) 
			/ (MaxX-MinX) );
		double yRatio = ( (GetDeviceCaps(printDlg.hDC,VERTRES) / GetDeviceCaps(printDlg.hDC,LOGPIXELSY) ) 
			/ (MaxY-MinY) );
		double ZoomFactor = xRatio > yRatio
			? yRatio
			: xRatio;
		if(bDisplayCoords)
			ZoomFactor *= .70;
		if(bDisplayLengthsAngles) // currently this doesn't enable viewing the dims.
			ZoomFactor *=.9;
		ZoomFactor *=.97;
		double OffsetX = ((ScreenWidthInInches-(MaxX*ZoomFactor))/2);
		double OffsetY = ((ScreenHeightInInches-(MaxY*ZoomFactor))/2);
		/////////////////////////////////////
		// End centering output to printer. //
		/////////////////////////////////////

		// temp coord values for printing just to simplify.
		// temp x coords.
		int tempX0 = int( ( (Intersections[0].x*ZoomFactor) + OffsetX ) * double (iPixelsPerInchX) ) ;
		int tempX1 = int( ( (Intersections[1].x*ZoomFactor) + OffsetX ) * double (iPixelsPerInchX) ) ;
		int tempX2 = int( ( (Intersections[2].x*ZoomFactor) + OffsetX ) * double (iPixelsPerInchX) ) ;
		int tempX3 = int( ( (Intersections[3].x*ZoomFactor) + OffsetX ) * double (iPixelsPerInchX) ) ;
		// temp y coords.
		int tempY0 = int( ( (Intersections[0].y*ZoomFactor) + OffsetY ) * double (iPixelsPerInchY) ) ;
		int tempY1 = int( ( (Intersections[1].y*ZoomFactor) + OffsetY ) * double (iPixelsPerInchY) ) ;
		int tempY2 = int( ( (Intersections[2].y*ZoomFactor) + OffsetY ) * double (iPixelsPerInchY) ) ;
		int tempY3 = int( ( (Intersections[3].y*ZoomFactor) + OffsetY ) * double (iPixelsPerInchY) ) ;

		// Draw crap here...
		SelectObject (printDlg.hDC, GetStockObject (BLACK_PEN)) ;
		MoveToEx ( printDlg.hDC, tempX0 , tempY0, NULL );
		LineTo   (printDlg.hDC, tempX1, tempY1) ;
		LineTo   (printDlg.hDC, tempX2, tempY2) ;
		LineTo   (printDlg.hDC, tempX3, tempY3) ;
		LineTo   (printDlg.hDC, tempX0, tempY0) ;

		// ...miscellaneous text output omitted for brevity...

		// Delete gdi stuff here.
		//delete pen;
		delete graphics;
		EndPage(printDlg.hDC);
		EndDoc(printDlg.hDC); 
	}
	if(printDlg.hDevMode) 
		GlobalFree(printDlg.hDevMode);
	if(printDlg.hDevNames) 
		GlobalFree(printDlg.hDevNames);
	if(printDlg.hDC)
		DeleteDC(printDlg.hDC);
	GdiplusShutdown(gdiplusToken);
return 0;
}

[Bajanine]

I think I figured it out:

From MSDN:

"The default mapping mode is MM_TEXT. One logical unit equals one pixel. Positive x is to the right, and positive y is down."

Somewhere along the way a cut my mapping mode out!