SendMessageEx
Sends a message with four parameters to the given cog. SendMessageEx() will return a value if the message uses ReturnEx()
to send a value back. You can use any message listed in the Message Section, but not custom messages. The userx and
globalx messages were created for use by the SendMessage verbs. Syntax:
retval=SendMessageEx(cog, message, param0, param1, param2, param3);