Window.SendMessage

Description

• Sends a WinAPI SendMessage() call to each window matching the specified caption list.
  

Syntax

• Window.SendMessage(msg, wp, lp, han)

Parameters

msg

(mixed) the message to be sent

Possible Values

wm_command

 

wm_app

 

wm_user

 

wm_user+n

where n is a number

wp

(integer) specifies additional message-specific information

lp

(integer) specifies additional message-specific information

han

(mixed) handle or class of the window(s) to act on

Return Value

• (mixed) depends on the message sent

Examples

• Window.SendMessage("wm_command", 40046, 0, "c=winamp v1.x")
  • Pauses Winamp.
• Window.SendMessage("wm_user", 1, 105, "c=winamp v1.x")
  • Sets variable SendMessage to length of current track

Notes

• The WinAPI function, SendMessage, sends the specified message to the target window(s), calling the window procedure & waiting for it to process the message before returning.
• Precede parameter integer values with "0x" to indicate a hexadecimal number, for example:
  • 0x1f0a
• Note that Window.PostMessage() is generally safer to use than Window.SendMessage(), unless a return is needed from the message handler.

See Also

• Window.PostMessage()
  • PPSR > Built-in Commands > Commands > Window > Actions > PostMessage
• http://msdn.microsoft.com/library/en-us/...andMessageQueuesFunctions/SendMessage.asp