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:\LEADTOOLS21\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:\\LEADTOOLS21\\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:\\LEADTOOLS21\\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.

Help Version 21.0.2021.7.2
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Raster Imaging C++ Class Library Help
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LEADTOOLS Raster Imaging Features
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.