主要实现VB环境打印功能向VB.NET环境的转变，在VB.NET环境下充分利用VB原有的那个API函数，实现自己需要的打印模式-The main achievement of VB to VB.NET printing environment changes in the environment, in VB.NET environment take full advantage of VB that the original API function, the realization of t