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user-defined message from DLL to CView

Posted on 2000-05-10
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Last Modified: 2013-12-03
I am sending a message from a DLL using PostThreadMessage to the main thread but I could catch the message only in CMainFrame class. But I would like to get it in CView. I tried to write the message handler in CView but it did not help. How can I do it?
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Question by:keremcaglar
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saurabh_dasgupta earned 150 total points
ID: 2796424
PostMessage(HWND, msg ..) would have  worked fine if you want to asynchronously pass a message to a specified window.

The DLL may or may not know the window handle of the window that is encapsulated by the CView . It knows the thread id to which the message is to be posted .

In your DLL, you are doing a PostThreadMessage , and this is handled by your CMainFrame window . Since you are able to handle the message in CFrame, why not a write a message handler in CFrame to pass on this message to the CView ?

I think that , by doing the above, you will not be deviating from your original design concept of the DLL not knowning anything about the CView, and only using the threadId for posting the message.

Further , you must remember that all the messages that are posted using PostThreadMessage , have the hwnd member of the MSG structure returned from GetMessage equal to NULL.

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