Using the eprotect.exe utility (Windows)

Windows users can use the eprotect.exe utility to run the preprocessor on the IBM® Informix® ESQL/C source file.

The eprotect.exe utility protects all of the SQL keywords against interpretation by the C preprocessor. The eprotect.exe -u option removes SQL keyword protection.

To change the preprocessor order for the Informix ESQL/C source file on Windows:

Run the following command:
```
%INFORMIXDIR%\lib\eprotect.exe filename.ec filename.c
```
This command protects all of the SQL keywords against interpretation by the C Preprocessor and writes the result to the file filename.c.
Run the following command:
```
cl /E filename.c   > filename2.c
```
This command runs the C Preprocessor on the source file filename.c and writes the result to the file filename2.c.
Run the following command:
```
%INFORMIXDIR%\lib\eprotect.exe -u filename2.c filename.ec
```
This command removes SQL keyword protection and stores the result in filename.ec.
Run esql on the source file to compile it.