How to send messages to the dialog in the other thread? 1

[uncool]

I created a dialog based mfc project in which another dialog can be started with a new thread. My question is that how can i send some messages to the newly started dialog in the main dialog? TIA.

 

[palbano]

Hi uncool, welcome to Tek-Tips

Take a look at the SDK docs for PostThreadMessage()

Good luck

-pete

 

[LazyMe]

That would be a message to the newly created thread.

If you want to send it to the dialog itself use Send- or PostMessage().

Greetings,
Rick

 

[pankajkumar]

Yeah SendMessage will ensure that message is delivered and will not return unless it does its task but nothing such with PostMessage

 

[uncool]

thanks pete and rick!

Sorry I didn't make my question clear I knew how to send messages with Post/SendMessage but does it mean that I need to make the dialog a global variable? I hate this I don't know how to visit this dialog class in the Main Dialog. Because the dialog is started with a thread.

 

[LazyMe]

You only need to have a handle to the dialog if you want to send it messages. Since this is all about sending messages, you might consider sending this handle to the main dialog using SendMessage

Greetings,
Rick

 

[uncool]

( Sorry I don't know how to edit my posted messages )

The dialog is started within the newly created thread, in other word, the dialog is not a member of the main dialog. I tried to use AfxGetApp->m_pMainWnd to visit the main dialog, failed. And I also tried to post some messages to the thread based dialog from main dialog but no way was found. Of course I can visit this dialog by clarfying it as a global variable, but it's not a good one. So what I gonna do? Thanks!

 

[LazyMe]

You can send a pointer to the main dialog into the newly created thread. This way you can "visit" it from within the second dialog.

>>And I also tried to post some messages to the thread based dialog from main dialog but no way was found.
How did you do this? You'll need a handle to the dialog to be able to send messages to it, don't you?

If all you want is communication between the two dialogs, I would suggest you send in a pointer to the main dialog when creating the second thread. Then, from the second thread, send in a pointer to the second dialog by creating some method called "Set2ndDlgPtr" or something like that....

Greetings,
Rick

 

[uncool]

thanks rick, it's ok now