SendMessage Usage

clunix · 24th July 2002, 18:14

Where can I find all the available messages and their values? What are wparam and lparam? I found examples in the Winamp forum but I don't know what the different wparam and lparam values will do. How would I close a window once I have the HWND from FindWindow? SendMessage $R9 16 ? ?

From the docs:
SendMessage HWND
msg
wparam
lparam
[user_var(return value)]

... Here are a few example messages and their values:

* WM_CLOSE 16
* WM_COMMAND 273
* WM_USER 1024

kichik · 24th July 2002, 18:53

Include WinMessages.NSH in your NSIS directory to your script and you will have them all defined.

clunix · 24th July 2002, 19:52

Sorry, I don't know what you mean by this.

kichik · 24th July 2002, 20:02

Add this line:
!include "C:\Program Files\NSIS\WinMessages.nsh"
At the top of your script.

If you use NSIS 2.0a1 put this line:
!include "C:\Program Files\NSIS\Examples\WinMessages.nsh"

Then you will be able to use any windows message by its name.

Example:

FindWindow $0 "Winamp v1.x"
SendMessage $0 ${WM_CLOSE} 0 0

clunix · 24th July 2002, 20:26

Great. THANKS. But what are the wparam and lparam values for? What are they used for?

kichik · 24th July 2002, 20:32

Every messages deals with its WPARAM and LPARAM differently. They are just two parameters for every message, like functions in C.

WM_CLOSE ignores them, so you can leave them both at 0.

For more information on every message and its parameters go to MSDN and search for the message name.

clunix · 24th July 2002, 20:47

Thanks again and thanks for the fast response.

kichik · 24th July 2002, 21:00

Glad I can help

24th July 2002, 18:14	#1
clunix Junior Member Join Date: Jul 2002 Posts: 4	SendMessage Usage Where can I find all the available messages and their values? What are wparam and lparam? I found examples in the Winamp forum but I don't know what the different wparam and lparam values will do. How would I close a window once I have the HWND from FindWindow? SendMessage $R9 16 ? ? From the docs: SendMessage HWND msg wparam lparam [user_var(return value)] ... Here are a few example messages and their values: * WM_CLOSE 16 * WM_COMMAND 273 * WM_USER 1024

24th July 2002, 18:53	#2
kichik M.I.A. [NSIS Dev, Mod] Join Date: Oct 2001 Location: Israel Posts: 11,343	Include WinMessages.NSH in your NSIS directory to your script and you will have them all defined. NSIS FAQ \| NSIS Home Page \| Donate $ "I hear and I forget. I see and I remember. I do and I understand." -- Confucius

24th July 2002, 20:02	#4
kichik M.I.A. [NSIS Dev, Mod] Join Date: Oct 2001 Location: Israel Posts: 11,343	Add this line: !include "C:\Program Files\NSIS\WinMessages.nsh" At the top of your script. If you use NSIS 2.0a1 put this line: !include "C:\Program Files\NSIS\Examples\WinMessages.nsh" Then you will be able to use any windows message by its name. Example: FindWindow $0 "Winamp v1.x" SendMessage $0 ${WM_CLOSE} 0 0 NSIS FAQ \| NSIS Home Page \| Donate $ "I hear and I forget. I see and I remember. I do and I understand." -- Confucius

24th July 2002, 20:32	#6
kichik M.I.A. [NSIS Dev, Mod] Join Date: Oct 2001 Location: Israel Posts: 11,343	Every messages deals with its WPARAM and LPARAM differently. They are just two parameters for every message, like functions in C. WM_CLOSE ignores them, so you can leave them both at 0. For more information on every message and its parameters go to MSDN and search for the message name. NSIS FAQ \| NSIS Home Page \| Donate $ "I hear and I forget. I see and I remember. I do and I understand." -- Confucius

24th July 2002, 21:00	#8
kichik M.I.A. [NSIS Dev, Mod] Join Date: Oct 2001 Location: Israel Posts: 11,343	Glad I can help NSIS FAQ \| NSIS Home Page \| Donate $ "I hear and I forget. I see and I remember. I do and I understand." -- Confucius

24th July 2002, 19:52	#3
clunix Junior Member Join Date: Jul 2002 Posts: 4	Sorry, I don't know what you mean by this.

24th July 2002, 20:26	#5
clunix Junior Member Join Date: Jul 2002 Posts: 4	Great. THANKS. But what are the wparam and lparam values for? What are they used for?

24th July 2002, 20:47	#7
clunix Junior Member Join Date: Jul 2002 Posts: 4	Thanks again and thanks for the fast response.

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