Taskbar Integration – Overlay Icons

We have already looked at the TASKBARID property in an earlier posting but there are also several other properties that allow your OI forms to integrate closely with the taskbar via such items as overlay icons and progress bars.  In this post we’ll take a quick look at the new OVERLAYICON property.


This property allows you to specify an icon that will be superimposed onto the bottom right of your form’s taskbar button.  It is designed to highlight a status change in your program and is used by applications such as MSN Messenger to denote the user’s online status.

This property is similar to the standard ICON property where you simply specify the name and path of an icon file, or it’s DLL resource ID.


Form without an overlay icon

Form without an overlay icon

Form with an overlay icon

Form with an overlay icon

Further reading

More information on Overlay Icons can be found here, along with some guidelines on their usage here.

(Disclaimer: This article is based on preliminary information and may be subject to change in the final release version of OpenInsight 10).

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