How do I ask Windows for the size of system tray icons?

Question

I noticed that my app sends icons to the Windows tray with a size of 16x16 pixels--and my Vista PC I\'ve got a doublewide taskbar that appears to show icons at 18x18. The re

Answer 1

Create your icons in multiple formats, and let Windows select the one it wants.

Here's the Wikipedia article on the .ico format.

If you really need to know, GetSystemMetrics with a parameter of SM_CXICON or SM_CYICON will tell you the width and height that Windows wants to load.