Use this function to send a message to a window. The window processes the message and afterwards the window returns a value to this function. The function demands the following parameters:

Parameter 1 -> Window Class Name
Parameter 2 -> Window Title
Parameter 3 -> Message
Parameter 4 -> WParam
Parameter 5 -> LParam

Every window of a software processes messages in different ways, so please read the documentary of the software to which you want to send messages.

If the window isnt found, a empty string is returned.

Example:

%System.SendMessage('Winamp v1.x','',1024,0,104)

This function call returns the status of winamp by sending the appropriate window message.