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.NET Forum / Languages / Managed C++ / March 2004Question about event handling in a win32 c++ application
Is it possible to create a window and associate 2 windows procedures to it for event handling I mean LRESULT CALLBACK WndProc1(...... LRESULT CALLBACK WndProc2(...... and then WNDCLASS wc .. wc.lpfnWndProc = WndProc1 How to bind the second window procedure to the WNDCLASS? Thanks in advance =?Utf-8?B?R0FFTA==?= wrote: > Is it possible to create a window and associate 2 windows procedures > to it for event handling? I mean: No. > wc.lpfnWndProc = WndProc1; > > How to bind the second window procedure to the WNDCLASS?. Call the second WndProc2 from the first one if the message was not handled.  SignatureGreetings Jochen Do you need a memory-leak finder ? http://www.codeproject.com/tools/leakfinder.asp > Is it possible to create a window and associate 2 windows procedures to it for event handling? > I mean: [quoted text clipped - 9 lines] > > How to bind the second window procedure to the WNDCLASS?. I'm still not quite sure what you mean, but you could have the 2nd procedure address in the instance data and the first call/defer to it something like WC_DIALOG does. SignatureJeff Partch [VC++ MVP] a part of what i want to do is : i want to create a win32 dll. That dll creates a window with some event handling. And I want any client application to be able to Interact with that window, by adding some additional event handling. How can I write event handling code within the client application? > a part of what i want to do is : i want to create a win32 dll. That dll creates a window with some event handling. And I want any client application to be able to Interact with that window, by adding some additional event handling. How can I write event handling code within the client application? Export a function via which the client can pass the address of its handler function to the dll (if you already have an exported Create the window function, this can just be an optional parameter), store it in the window's instance data and have the window's WindowProc check for it and call it when appropriate. Of course, there's always subclassing too. SignatureJeff Partch [VC++ MVP] Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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