Hi,
Unfortunately, you can't change this using any of CVI's base commands. This is usually statically set when you build the application and specify an icon file in your target settings. You would have to go into using Windows SDK commands to possibly do this programmatically. As a suggestion, what if you just create your own dialog box from a CVI panel and put a picture on the dialog? Then, in your code instead of calling MessagePopup, call InstallPopup and call your panel. Use GetUserEvent to wait for the user to dismiss the dialog so you don't have to create a callback for the dialog box, and also it will hold the execution so that the user must dismiss the box. That may be easier for you to implement than going through SDK calls.
Jeremy L.
Nationa
l Instruments
Jeremy L.
National Instruments