本程序用Visual Basic编写完成，能够对pdf文件打开灯操作。方便大家在程序中嵌入对pdf文档的处理。-the procedures using Visual Basic prepared and able to operate lights pdf documents. To facilitate the process of embedding pdf file handling.

本程序用Visual Basic编写完成，能够对pdf文件打开灯操作。方便大家在程序中嵌入对pdf文档的处理。-the procedures using Visual Basic prepared and able to operate lights pdf documents. To facilitate the process of embedding pdf file handling.

to open a pdf file or document