I have a problem with Aero Snap not working with the application I'm working on (Windows desktop, native C++ application), and I'm a bit confused as to what's happening, as it seems like it should just work, out of the box.

I've used Spy++ on a mininal win32 application, and get the following messages when I press Win-Left:

<00070> 00030D1C P WM_KEYDOWN nVirtKey:VK_LWIN cRepeat:1 ScanCode:5B fRepeat:0 fUp:0 <00071> 00030D1C P WM_KEYDOWN nVirtKey:VK_LWIN cRepeat:1 ScanCode:5B fRepeat:1 fUp:0 <00072> 00030D1C P WM_KEYDOWN nVirtKey:VK_LWIN cRepeat:1 ScanCode:5B fRepeat:1 fUp:0 <00088> 00030D1C S WM_GETMINMAXINFO lpmmi:0043FCBC
<00089> 00030D1C R WM_GETMINMAXINFO lpmmi:0043FCBC
<00090> 00030D1C S WM_WINDOWPOSCHANGING lpwp:0043FCC4
<00091> 00030D1C S WM_GETMINMAXINFO lpmmi:0043F8E8
<00092> 00030D1C R WM_GETMINMAXINFO lpmmi:0043F8E8
<00093> 00030D1C R WM_WINDOWPOSCHANGING
.. and so on

So I can see that the WM_KEYDOWN for the left key isn't reaching the application, but I'm getting the aero snap "resize window" stuff instead.

When I Spy++ my application, I can see that the left key isn't being "intercepted", but instead being passed on to the application, so I don't get any snapping goodness.

<00043> 000F0F12 P WM_KEYDOWN nVirtKey:VK_LWIN cRepeat:1 ScanCode:5B fRepeat:0 fUp:0
<00044> 000F0F12 P WM_KEYDOWN nVirtKey:VK_LWIN cRepeat:1 ScanCode:5B fRepeat:1 fUp:0
<00045> 000F0F12 P WM_KEYDOWN nVirtKey:VK_LWIN cRepeat:1 ScanCode:5B fRepeat:1 fUp:0
<00060> 000F0F12 P WM_KEYUP nVirtKey:VK_LEFT cRepeat:1 ScanCode:4B fRepeat:0 fUp:1

I'm going to dig into the cores of our message handling and see what's going on, but I'll take all the tips I can get :)