Description: Include: preview control Preview, Class PrnCls. Preview Preview use PictureBox controls to achieve the complete simulation Printer. PrnCls category to provide a unified interface, to achieve write once, at the same time to support the printer and preview control Preview. Print all of the programming objects by category PrnCls to achieve, as we saw in the example, through different PrintStartDoc parameters, can print or preview, and all the control of printing exactly the same code. Complex form as possible, we can debug when the output directed to the preview control Preview, good in debugging, the output to the printer, saving time and printing paper debugging!
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