代码说明： TWAIN is a specification that provides a standard interface for software applications to communicate with hardware devices such as scanners and digital cameras in a device-independent manner. MultiTWAIN is a library of routines that simplify the process of acquiring images from TWAIN-compliant devices. The thing that makes MultiTWAIN stand out from other packages is that it is the only freeware library for Delphi that supports the acquisition of multiple consecutive images from digital cameras and scanners with automatic document feeders. 和硬件设备通讯的说明书

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