When my App open, it will download data from server.
How to make a pop-up window (messagebox) saying that "Please wait..." and then auto close when download finished?
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When my App open, it will download data from server.
How to make a pop-up window (messagebox) saying that "Please wait..." and then auto close when download finished?
A messagebox will stop all code execution until it disappears.
Use a standard form instead and have it display until your downloading is done.
Typically, it is refered to as a "Splash Screen"