using Win32 SendMessage call

[esc67]

By reading Girder GML files it appears to me that SageView can handle old-style windows messages using the Win32 ::SendMessage API.

Further, I've seen a complete list of "commands" posted on this site. However, I don't know what parameters to use for:

message
wParam
lParam

"SageTV 1.01.GML" has "1258 1 6" for the Pause command, but nothing happens if I try:

::SendMessage(hWnd, 1258, 1, 6);

I've also tried:

::SendMessage(hWnd, WM_COMMAND, 6, 0);
::SendMessage(hWnd, WM_APP, 6, 0);

Can somebody help me with this?

-Erik

[nielm]

It does work -- I use these codes as arguments to PostMessage in my ATI remote wonder plugin.

One thing to note: hWnd needs to be the handle of the Application Class, not the top-level window, ie:

HWND hSageTV = FindWindow("SageApp", NULL);
if ( hSageTV != NULL ) SendMessage(hSageTV, 1258,1,6);

Note also that the last parameter of the SendMessage command matches the index of the command in the list in the detailed properties / Commands dialog, so you can extrapolate to get commands not defined in the GML file, eg:

-- Aspect Ratio Fill = 1258 1 47
-- Aspect Ratio 4x3= 1258 1 48
-- Aspect Ratio 16x9 = 1258 1 49

[LostInSpace]

Hi,

Can someone give an explaination about the parameters used with sendmessage? just to undertand what I'm doing ;-)

thanks

Ferdinand

[esc67]

The first parameter is "message = 2315", which makes it a Window message in the WM_USER range. See the following link for details:

http://msdn.microsoft.com/library/de...es/WM_USER.asp

SageTV apparently picked that as the magic number to identify the message as a control message.

wParam and lParam are paremeters whose purpose is defined by SageTV. I don't know why wParam is 1 and I don't know what would happen if you picked another number. Would 2 mean the button gets "pushed" twice?

-Erik

[esc67]

Originally posted by nielm

One thing to note: hWnd needs to be the handle of the Application Class, not the top-level window, ie:

HWND hSageTV = FindWindow("SageApp", NULL);

Ah! That was my problem. Thank you, it works!

-Erik