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使用PB调用API自动更新（非FTP模式）（二、API说明及定义（2））
5、CompareFileTime function ulong CompareFileTime( REF s_filetime lpFileTime1, REF s_filetime lpFileTime2) library "kernel32.dll" Alias for "CompareFileTime" VB 声明 Declare Function CompareFileTime Lib "kernel32" Alias "CompareFileTime" (
5、CompareFileTimefunction ulong CompareFileTime( REF s_filetime lpFileTime1, REF s_filetime lpFileTime2) library "kernel32.dll" Alias for "CompareFileTime"
| VB声明 | |
| Declare Function CompareFileTime Lib "kernel32" Alias "CompareFileTime" (lpFileTime1 As FILETIME, lpFileTime2 As FILETIME) As Long | |
| 说明 | |
| 根据FILETIME结构的信息，对比两个文件的时间 | |
| 返回值 | |
| Long，如两个时间相等，就返回零；如lpFileTime1小于lpFileTime2，返回-1；如lpFileTime2小于lpFileTime1，返回1 | |
| 参数表 | |
| 参数 | 类型及说明 |
| lpFileTime1 | FILETIME，参考FILETIME |
| lpFileTime2 | |
6、CopyFileA
function ulong CopyFileA(string lpExistingFileName, string lpNewFileName, long bFailIfExists) library "kernel32.dll" Alias for "CopyFileA"
function ulong CopyFileA(string lpExistingFileName, string lpNewFileName, long bFailIfExists) library "kernel32.dll" Alias for "CopyFileA"
| 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 |
| lpExistingFileName | String，源文件名 |
| lpNewFileName | String，目标文件名 |
| bFailIfExists | Long，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 |
