Do a global SendMessage to many windows in app?

[LucieLastic]

hi

I have several instances of a form open at the same time and I'd like to do a global SendMessage to all of them (to trigger a refresh) but don't know the Window handles of them, is it possible? Or will I have to start storing what windows are open and loop thru the list?

lou

 

[LucieLastic]

I'm thinking of using EnumWindows (just reading about it) but is there any other way?

 

[LucieLastic]

Found it, SendMessage with HWND_BROADCAST.

 

[LucieLastic]

Doh, can't get HWND_BROADCAST to work. I need to broadcast to child forms in the app. Help needed, if anyone has an example ...

lou

 

[Roderich]

hi Lou,

I'm using this code:

for w := 0 to Application.ComponentCount-1 do
if (Application.Components[w] is TForm) then
PostMessage((Application.Components[w] as TForm).Handle, .., .., ..);


regards
Rod

 

[LucieLastic]

Thanks Rod.

I've changed my app slightly to store the current handles of the windows open in a Tlist. Thanks for the suggestion though, I didn't think of using 'Application.' - I'm half a sleep today. I may use your suggestion as at the mo. I'm having to maintain the list myself when windows are opened and closed.

thanks again
lou