JC>   I've just started programming in Watcom 9.5 and would like to know how
 JC>   to change screen colors (back and forground) in an Os/2 text window.
 JC>   Can anyone help me?

You can use ansi codes (if you want to continue using printf() etc),  or
the OS/2 text (Vio) api.  For docs on the Vio api,  look for PRCP.ZIP on a
fine os/2 bbs near you.  Here's a small example:

 #define INCL_NOPMAPI
 #define INCL_VIO
 #include 
 #include 
 #include 

 int main(void)
 {
     int i;
     char msg[40];
     BYTE attr;

     VioScrollUp(0, 0, 0xffff, 0xffff, 0xffff, " \x7", 0);  // cls

     attr = 15;  // start off with bold on black background.
     for(i=0; i<22; i++){
         sprintf(msg, "Line %2d: Programming is fun!", i);
         VioWrtCharStrAtt(msg, strlen(msg), i, i, &attr, 0);

         attr += 16;     // change background colour.  Note: attributes
                         // are just like they are under dos when poking
                         // into video memory.
     }


     VioSetCurPos(23, 0, 0);      // so cursor is at bottom when program ends
     return 0;
 }


--- Maximus/2 2.01