[CalvinC]

Just make the second button contain nothing:

pawn Код:

ShowPlayerDialog(playerid, DIALOG_CMDS, DIALOG_STYLE_MSGBOX, "Title", "text", "Button1", "");

Then it wont be displayed.
And i use an enumerator so that the numbers gets assigned automatically, you can use #define as well to define numbers, but using an enumerator is easier and less confusing.