Painting Pages and Zones Using OCR Plus

To add code to an existing project in order to paint pages and zones:

1.	Start with the program you created in Working with Zones.
2.	Define the following global variables in Ezfunc.h in the OCR_Ltdoc directory:

L_BOOL bDrawZones;
L_BOOL bDrawPage;

3.	Define the following global ID in Ezfunc.h in the OCR_Ltdoc directory:

#define IDM_DRAW_ZONES 204

4.	Edit EZFUNC.RC file in the OCR_Ltdoc directory and add the following lines:

MAIN_MENU   MENU
BEGIN
   ...
   ...
   MENUITEM "Enable Draw Zones"     IDM_DRAW_ZONES
END

5.	In Ezfunc.cpp in the MainWndProc procedure, add the following code to the switch statement for WM_COMMAND:

      case IDM_DRAW_ZONES:
         bDrawZones = !bDrawZones;
         InvalidateRect (hWnd, NULL, FALSE);
         break;

6.	In EZFUNC.CPP under WM_CREATE inside IDM_INSERT_PAGE, add the following after "L_DocAddPage(…)if (nRet != SUCCESS){…}" :

      L_DocSetActivePage(hDoc, 0);
      bDrawPage = TRUE;

      /* Get the client area of the adjusted window */
      GetClientRect(hWnd,&rClientSize);
      /* Make the destination rectangle for painting the same as the client area */
      rLeadDest = rClientSize;

7.	In the MainWndProc procedure, replace the following code to WM_PAINT (Refer to documentation for an explanation of L_DocDrawPage function):

   case WM_PAINT:
      hdc = BeginPaint (hWnd, &ps);

      if (bDrawPage)
      {
         if (hpalPaint) /* If we have a paint palette, select it */
         {
            hPalette = SelectPalette (hdc, hpalPaint, TRUE);
            /* Uncomment this if you do not process WM_QUERYNEWPALETTE */
            /* RealizePalette (hdc); */
         }

         L_DocDrawPage(hDoc, hdc, 0, NULL, NULL, &rLeadDest, &ps.rcPaint, SRCCOPY, bDrawZones);
         if (hpalPaint)         /* Return old palette */
            SelectPalette (hdc, hPalette, TRUE);
      }

      EndPaint (hWnd, &ps); /* Return DC */
      return 0;

8.	Build SimpleLoad.exe.
9.	Run SimpleLoad.exe.