Using the UNICODE version of LEADTOOLS in a non-UNICODE Application (C++ 5.0 and later)

Take the following steps to create and run a program that uses the UNICODE version of LEADTOOLS in a non-UNICODE application.

1. Start a new project as follows:

   Run Microsoft Visual Studio, select the File >New menu option, and do the following:

   1. Click the Projects menu item.
   2. In the New Project dialog, select Visual C++\MFC AppWizard (exe) as the project type and select "MFC Application" for the template.
   3. In the Project name text box, specify a name (for example "chartest").
   4. In the Location text box, specify the path of the project.
   5. Click the OK button.

2. In the Step 1 dialog box, do the following: Click Next on the next wizard.

   1. Select Dialog based.
   2. Click the Finish button.

3. From the main menu, select Project->Properties. Under Configuration\General, set the "Character Set" to "Not Set". Click OK button.

4. Edit the stdafx.h and add to the end of the file the following code (Note: you will have to change the path of ltwrappr.h to match the LEADTOOLS installation directory on your system):

   // Define the version of LEADTOOLS you are using. (keep in mind, to change the XX to current LEADTOOLS version) 
   #define LTVXX_CONFIG 
    
   // Force using UNICODE version of LEADTOOLS (we will need to convert all strings) 
   #define _LEAD_FORCE_UNICODE 
    
   // Include the LEADTOOLS C++ Class Library header file 
   #include "C:\LEADTOOLS22\Include\ClassLib\LtWrappr.h" 
    
   // Utility macro - Note: You might have to change the path to match your system. 
   #define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\LEADTOOLS22\\Resources\\Images\\")pFileName 

5. Edit stdafx.cpp and replace the contents of the file with the following code (Note: you will have to change the path to the .lib files to match your system):

   // stdafx.cpp : source file that includes just the standard includes 
   // chartest2.pch will be the pre-compiled header 
   // stdafx.obj will contain the pre-compiled type information 
   #include "stdafx.h" 
   #pragma comment(lib, "C:\\LEADTOOLS22\\Lib\\CDLL\\Win32\\Ltwvc_u.lib") 

6. Add a command button to your form and name it as follows:

   ID	Caption
   IDC_FILEINFO	File Info

7. Double Click on the new button and Add the following code:

   L_INT nRet; 
   FILEINFO FileInfo; /* LEAD File Information structure. */ 
   LFile File; 
   char szMessage[1024]; /* Buffer to hold information for display. */ 
   char szInputFile[_MAX_PATH]=MAKE_IMAGE_PATH("IMAGE1.CMP"); 
   LSettings::LoadLibraries (LT_FIL); 
    
   /* Convert non-UNICODE to UNICODE */ 
   L_TCHAR wcsInputFile[_MAX_PATH]=L"\0"; 
   mbstowcs(wcsInputFile, szInputFile, _MAX_PATH); 
    
   /* Get the file information */ 
   FileInfo.uStructSize = sizeof(FileInfo); 
   File.SetFileName(wcsInputFile); 
   nRet = File.GetInfo(&FileInfo, sizeof(FILEINFO), 0, NULL); 
   if(nRet != SUCCESS) 
      return; 
    
   /* Convert UNICODE to non-UNICODE */ 
   char szName[16]; 
   wcstombs(szName, FileInfo.Name, 16); 
   char szCompression[20]; 
   wcstombs(szCompression, FileInfo.Compression, 20); 
    
   /* Format the message string with data from the FILEINFO structure */ 
   wsprintf(szMessage, "Filename: %s\n\n" 
     "Format: %d\n\n" 
     "Width: %d\n\n" 
     "Height: %d\n\n" 
     "BitsPerPixel: %d\n\n" 
     "Size On Disk: %ld\n\n" 
     "Size In Memory: %ld\n\n" 
     "Compression: %s", 
     szName, 
     FileInfo.Format, 
     FileInfo.Width, 
     FileInfo.Height, 
     FileInfo.BitsPerPixel, 
     FileInfo.SizeDisk, 
     FileInfo.SizeMem, 
     szCompression); 
    
   /* Display the message string */ 
   MessageBox(NULL, szMessage, "File Information", MB_OK); 
   LSettings::UnloadLibraries (LT_FIL); 

8. On the Main menu, select Build > Build chartest.exe to build the project.

9. On the Main menu, select Build > Execute chartest.exe to run the project.