Re: Dialog doesn't move

Andrew Grant wrote:

> Just to be clear, I'm pretty sure you need to ignore all non-zero return
> values not just those that return TRUE. E.g.
 > while (dlg->Running() && GetMessage(&msg,NULL,0,0))
 >   if (!IsDialogMessage(dlg->Handle(), &msg))

Yes, that's what I did. That made the dialog seize up when clicking the 
title bar to move it, or clicking the close button. NOT ignoring the 
messages I listed made it work OK.

> My understanding is that the only use of IsDialogMessage() is to handle
> keyboard navigation between items so you should be safe to omit this call
> altogether if you don't need that functionality.

I do need it.

 > Make sure it's the dialog handle you're passing in,not your main
 > window.

I'm pretty sure -- see below.

Now, there is a little bit more to the story. I'm calling IsDialogEvent 
from inside a GetMessage WindowsHook, and if it (IsDialogEvent) returns 
true, I change the message to WM_NULL/0/0. The reason is that I'm 
actually hosted as a DLL inside another application. I've already 
recovered my HMODULE, the HMODULE of the host, and the HWND of the main 
window, so that's all good. I also know the thread is the same, because 
I only hook GetCurrentThreadId() in the SetWindowsHookEx() call.

So: with this set-up, I have to explicitly not ignore about six events 
(related to NC mouse actions), or the dialog siezes up. Such behavior 
isn't documented anywhere. Given that I don't have source for the host 
application, it's been more annoying to debug than I would have hoped.

Any more insights to this situation? ("You shouldn't want to do that" 
came to me, as well, but wouldn't help the current situation :-)

Cheers,

			/ h+


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