Print a Real Image Size in Inches (C++ Builder)

Take the following steps to start a project and to add some code that prints an image:

1.	Start C++ Builder.
2.	In the File menu, choose New Application.
3.	On the Builder toolbar, click the LEADTOOLS tab. If you have used a LEAD VCL control before, the icon appears on the toolbar. Otherwise, refer to Installing VCL before continuing with this tutorial.
4.	$image\btnlead.gif$ Select the LEAD Main control on the VCL toolbar. Size and position the control, as you want it to appear at run time.
5.	Add a button control to your form and name it as follows:
	Name	Caption
	btnPrint	Print
6.	Declare the following variables in the private section of Form1.

   float fRealWidth; //Image's real width in inches
   float fRealHeight;// Image's real height in inches
   int XRes;      // Number of pixels per logical inch along the screen width.
   int YRes;     // Number of pixels per logical inch along the screen Height.

7.	Handle the btnPrint button's click procedure and add the following code to it to load the image:

LEADImage1->Load("c:\\image1.cmp", 0, 0, 1);

8.	Calculate the real width and height of the bitmap in inches. Add the following code to btnPrintClick procedure:

fRealWidth= LEADImage1->BitmapWidth / LEADImage1->BitmapXRes;
fRealHeight= LEADImage1->BitmapHeight / LEADImage1->BitmapYRes;

9.	Print the image using its real size in inches. Add the following code to btnPrintClick procedure:

   Printer()->BeginDoc ( ) ;

   //You should have the number of pixels per logical inch (XRes, YRes)
   XRes= GetDeviceCaps ( Printer()->Canvas->Handle, LOGPIXELSX );
   YRes= GetDeviceCaps ( Printer()->Canvas->Handle, LOGPIXELSY );

   LEADImage1->Render((int)Printer()->Canvas->Handle, 1, 1, (int)(XRes * fRealWidth), (int)(YRes * fRealHeight) ) ;

   Printer()->EndDoc ();

10.	Add #include <printers.hpp> to Unit1 header file (Unit1.h).
11.	Run your program to test it.