如何在Web应用程序中使用TWAIN驱动程序的自定义功能？
DWObject.SelectSource();DWObject.OpenSource();DWObject.Capability = 0x8001; DWObject.CapType = 5; //TWON_ONEVALUE DWObject.CapValue = 1; if (DWObject.CapSet()) alert("successful"); else alert("Source doesn't support this capatiblity");

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