它在TTwainSource类(名为ShowUI)中具有布尔属性.使用该属性，您可以控制是否显示扫描仪的本机UI.

It has a boolean property in TTwainSource class named ShowUI. Using that property, you can control whether native UI of the scanner should be shown or not.

但是请注意，无论将ShowUI设置为True还是False，某些扫描仪都会强制显示其UI.

But take note that some scanners show their UI forcefully whether you set ShowUI to True or False.