[Shouty]

Better...

Code:

if(strcmp("/credits", cmdtext, true) == 0) // Under OnPlayerCommandText
{
ShowPlayerDialog(playerid,1,DIALOG_STYLE_MSGBOX,"Credits","Server Owner: Blah Blah\nServer Scripter : Blah blah\nServer Mapper: Blah blah","Ok","Exit"); 
return 1;
}