To customize character set conversion

Note: When creating a customized character set conversion, the resulting program will not be thread safe. This will cause problems in the Communications Process (MFCS), resulting in memory corruption.

To prevent this, insert a Local-Storage Section declaration immediately after the Working-Storage Section in the %ProgramFiles(x86)%\Micro Focus\Visual COBOL for Visual Studio 2012\src\codeset\csnnnn.cbl file, where nnnn is the 4-digit country code.

Start a Visual COBOL command prompt. If you need instructions, see To start Visual COBOL command prompt.
Create a new folder to hold temporary files and make it the current folder. For example:
Windows:
```
md mylang
cd mylang
```
At the command prompt, enter:
Windows:
```
set mfcodeset=nnnn
```
where nnnn is the supported 4-digit country code whose character set conversion tables are most similar to the customized versions you want to create.
Enter:
```
codecomp /p mapfile.a2e mapfile.e2a
```
The files mapfile.a2e and mapfile.e2a are created in the current folder.
Edit the conversion tables in the mapfiles to suit your requirements. mapfile.a2e contains the ANSI to EBCDIC conversion table; mapfile.e2a contains the corresponding EBCDIC to ANSI conversion table.
Enter:
```
codecomp mapfile.a2e mapfile.e2a
```
A file codeset.cpy is created in the current folder.
Enter:
Windows:
```
copy "%ProgramFiles(x86)%\Micro Focus\Visual COBOL for Visual Studio 2012\src\codeset\csnnnn.cbl" csnnnn.cbl
```
Note: For 32-bit Windows, %ProgramFiles(x86)% becomes %ProgramFiles%.

where %ProgramFiles(x86)%\Micro Focus\Visual COBOL for Visual Studio 2012 is your installation directory and nnnn is a number between 2000 through 9999 (excluding 9122) that you use to refer to your customized codeset module.
Enter:
Windows:
```
cobol csnnnn.cbl omf(gnt);
```
Enter:
For 32-bit Windows environments:
```
copy csnnnn.gnt "%ProgramFiles%\Micro Focus\Visual COBOL for Visual Studio 2012\bin"
```
For 64-bit Windows environments:
```
copy csnnnn.gnt "%ProgramFiles(x86)%\Micro Focus\Visual COBOL for Visual Studio 2012\bin64"
```
Note: For 32-bit Windows, %ProgramFiles(x86)% becomes %ProgramFiles%.

where %ProgramFiles(x86)%\Micro Focus\Visual COBOL for Visual Studio 2012 is your installation directory and nnnn is the customized codeset number.