With the SoftVelocity 3GL compilers installed, the Clarion development environment takes all the action necessary to call the correct compiler for each source module in the application. You cannot mix languages in a single source module; however, an application can contain any number of source modules written in any of the 3GLs or Clarion.
The development environment calls the correct compiler for each module at compile time by looking at the source file extensions, as follows:
Source File Extension Compiler Called
.CLW Clarion
.CPP or .C C++
.MOD Modula-2
Tal cual pone aqui en el manual si instalas el compilador 3GL de SoftVelocity se su`pone que si podrias incluir modulos de C en un INCLUDE para que se compilaran junto con el programa Clarion de tu aplicacion.
Saludos Joan