Plug In data type question

[SJOE]

Hi,

Could you please teach me how to convert plug in parameters to char *?

I want to use one of the Plugin parameters as a file name then open an external file.

The prototype of external file is:

OpnFl(char *filename);

aftter I get the parameter and call the function using

OpnFl(dataVect.AtAsText(0));

It doesn't work, how to solve this problem?

Thanks a lot!