Dynamic Web TWAIN: How can I disable the scanning progress dialog?

You can use Dynamic Web TWAIN's IfShowIndicator property to disable the scanning progress dialog during the acquisition and transfer, regardless of whether the Source's user interface is active.

Javascript Code:

function scanImage() {
    var DWObject = Dynamsoft.WebTwainEnv.GetWebTwain('dwtcontrolContainer');
    if (DWObject) {
        DWObject.SelectSource();
        DWObject.OpenSource();
        DWObject.IfShowUI = false;
        DWObject.IfShowIndicator = false;
        DWObject.AcquireImage();        
    }
}