I try to display a wait form for a long process by using ProgressBarAdv(ProgressStyle:WaitingGradient ). Please see my attached sample. Clisk button "Display Wait Form (WaitingGradient is moving)", you can see the WaitingGradient bar is moving, it is good. But click the button "Display Wait Form for Long Process (WaitingGradient is not moving)", you can see the label message is changing, but the the WaitingGradient bar is not moving. How can I make it moving?