void func()

{

    WINDOWPTR wnp;

    int temp;

    temp = VID_ECHO;

/* Save screen echo flag

*/

    VID_ECHO = OFF;

/* Turn screen echo off

*/

    . . .

    . . .

    VID_ECHO = temp;

/* Your code that writes to screen

*/

    if(VID_ECHO)

/* Echo to screen if necessary

*/

       vs_updrgn(wnp->rbf, wnp->cbf, wnp->ref, wnp->cef);

    return();

}