Where’s my Info Balloon?

I’ve recently discovered a problem with my dotNet program. Well, as I found out, it may not be a problem with my program. I display a maximized, borderless window (#1) and then transition to a normal, sizable bordered window (#2), which is also maximized. The borderless window, when maximized, covers the taskbar, which is fine. However window #1 creates window #2, which apparently also gives window #2 a higher z-order than the task bar. When window #2 finishes loading, it sends an event to window #1, instructing it to close.

So, at first glance, window #2 seems fine. It doesn’t appear to cover the taskbar, but on closer inspection it does by just a few pixels. Even this would not be a problem until I came across a problem with my info balloon.

I am using a class I created, similar to this one I found on CodeProject. When window #2 was visible, my info balloon would disappear. Even if the window was in “restored” mode and nowhere near the balloon, it would still be gone. When I minimize the window, the balloon instantly appears. I’ve come to the conclusion that this must be due to the fact that window #2 has a higher z-order than the task bar. I’m developing on Windows 2000, so I’m not sure if this is an issue in XP too.

So, to correct the problem, I had to allow the taskbar to be visible during the display of window #1 and essentially create my own maximize function.

/* Properties for window #1 */
this->FormBorderStyle =
this->StartPosition =

/* In Load function of window #1 */
Screen* primary = Screen::PrimaryScreen;
System::Drawing::Rectangle *rect =
this->Size = rect->Size;
this->Location = rect->Location;

Now, I certainly won’t claim that this is the best solution. I’m sure there must be something I can do on load of window #2 to force it below the taskbar, but I’m not sure how to get there yet. In my opinion, because window #2 is created with a sizable border, Windows should be responsible for giving it the correct z-order placement, regardless of who creates it. Please leave a comment if you’ve got some ideas.

This entry was posted in C++, DotNet, Programming. Bookmark the permalink.

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