video_switch does not return a useful value - or at least not one that is documented. It sets the result variable to 1 if the switch was successful and 0 if it was not. The setting of result occurs internally, so you do not need the returned value.

eg.

code:

---

function game_resolution()
{
   var v;
   v=video_mode+1;
   if v==11 { v=6;}
   video_switch(v,0,0);    // don't need the return value
   printnum(result);         // result holds whether the switch was successful
   if cow==0 { breakpoint;} //testing...
   InventoryDisplay(0);
   _show_resolution();
} 

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