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  1. PO
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    <p>I see what you are trying to do now, I have achieved this in my application framework called Lucid (it is still a work in progress). For the sake of the answer, your window class will be called <code>Window</code> instead of <code>APP</code>.</p> <p>This is done by passing a global procedure to every window you create. All windows share this same procedure. Every time any window gets a message, that message is sent to the global procedure, the global procedure checks if the <code>HWND</code> belongs to a <code>Window</code> that you created, and if it does, sends the message to that <code>Window</code>s' procedure. Here's an overview of how this works.</p> <pre><code>class Window { public: // The contents of this function can vary from window to window // provided that you make a subclass and override this method. virtual LRESULT procedure(HWND wnd, UINT msg, WPARAM wp, LPARAM lp); // When you create a Window object, add a pointer to it in this map. // Eg. if (this-&gt;hwnd != NULL) createdWindows[this-&gt;hwnd] = this; static map&lt;HWND, Window*&gt; createdWindows; // When you create a window, make this its procedure. static LRESULT CALLBACK routeMessage(HWND wnd, UINT msg, WPARAM wp, LPARAM lp) { if (createdWindows.find(wnd) != createdWindows.end()) { // Message belongs to one of our 'Window' objects. // Pass the message to that window and return the result. return createdWindows[wnd]-&gt;procedure(wnd, msg, wp, lp); } else { // It seems you made 'routeMessage' the procedure // of a window that doesn't belong in the map. Go ahead // and process the message in the default manner. return DefWindowProc(wnd, msg, wp, lp); } } }; </code></pre> <p>Now you will only need a single message loop and a single thread. I hope this helps. If it doesn't, I can give you the source code to my project Lucid that demonstrates this concept, along with event handlers. I have a test project using Lucid that creates 2 windows with different procedures on a single thread with a single message loop:</p> <pre><code>#include "Lucid.h" using namespace Lucid; void sayBye(MessageEventArgs&amp; e) { MessageBox(NULL, "Goodbye!", "Form 2", MB_OK); e.handled = true; } void Program::onStart() { Form* myForm1 = new Form("Hello World!"); myForm1-&gt;show(); Form* myForm2 = new Form("Hello World!"); myForm2-&gt;addMessageHandler(WM_CLOSE, sayBye); myForm2-&gt;show(); // This Program::onStart() function is called // immediately before the single message loop is entered. } </code></pre>
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    1. POApplication with multiple windows as instances of a class, C++
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    1. USBrandon Miller
    1. USBrandon Miller
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    1. COThanks. This is also very interesting. I will try it and post my thoughts about it.
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      1. USbercik
 

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