本文来自：www.kttec.net
CopyFile
VB声明Declare Function CopyFile Lib "kernel32" Alias "CopyFileA" (ByVal lpExistingFileName As String, ByVal lpNewFileName As String, ByVal bFailIfExists As Long) As Long说明复制文件。与vb的filecopy命令相似返回值Long，非零表示成功，零表示失败。会设置GetLastError参数表参数类型及说明lpExistingFileNameString，源文件名lpNewFileNameString，目标文件名bFailIfExistsLong，如果设为TRUE（非零），那么一旦目标文件已经存在，则函数调用会失败。否则目标文件被改写转载于:https://www.cnblogs.com/kttec/archive/2011/07/12/2104003.html
