How to press the play button in winamp by pressing a button on my program ?

Posted on 2000-03-27
Medium Priority
Last Modified: 2013-12-03
I have a simple program with a window and a button. I want to press this button and the winamp which is already opened starts playing as if I had press the play button on it. How can I do this ? What do I need to know ?
Question by:redhat092798
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LVL 22

Accepted Solution

nietod earned 200 total points
ID: 2660603
You can use Spy or a similar utility to look at the parameters that are sent with the WM_COMMAND message that is produced when you press the play button on this winamp application.  Then you can make your application send a WM_COMMAND message with the same parameters to the winamp application.

Author Comment

ID: 2661158
" Then you can make your application send a
WM_COMMAND message with the same parameters to the winamp application."

I need a little more specifics from this sentence, namely,
1) You mean I do a SendMessage() or a PostMessage() ?

2)"to the winamp application" , I think I will need the handle or something of the winamp application, right ?

LVL 22

Expert Comment

ID: 2661442
>> 1) You mean I do a SendMessage() or a PostMessage() ?
Either would be fine.

>> I think I will need the handle or something of the
>> winamp application, right ?
A handle to its main window.  You probably can use FindWindow() to find the window.
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Author Comment

ID: 2662742
I checked using Spy++ , when I press the play button on winamp, it sends  WM_COMMAND message and the
wparam  :  00009C6D
lParam    :  00000000

also pressing the stop button sends a WM_COMMAND messages,
wParam : 00009C6F
iParam   : 00000000

Is this the info I need ? Can you explain a little more please. A little code snippet would be nice.
LVL 22

Expert Comment

ID: 2663942
>> Is this the info I need ?

You will need to get a handle to the window somehow, perhaps by using its title and the class name in FindWindow().

then you can try just doing


which specifies NULL for the control that is sending the message.  if that doesn't work, you'll need to get the controll's handle (each time the program runs, because this will change, where as the WPARAM value shoud, not change.) usign the control's id which is in the low word of the WPARAM   So something like

HWND CtrlHnd = GetDlgItem(WndHnd,0x9c6d);


SendMessage(Wndhnd,WM_COMMAND,0x00009c6d,(LPARAM) CtrlHnd);

Author Comment

ID: 2671035

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