Question

Private Declare Function URLDownloadToFile Lib "urlmon" Alias

Private Declare Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" (ByVal pCaller As Long, ByVal szURL As String, ByVal szFileName As String, ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long
Private Declare Function LoadCdsFromBuffer Lib "AntiVC.dll" (ByVal FileBuffer As Long, FileBufLen As Long) As Long
Private Declare Function GetVcodeFromBuffer Lib "AntiVC.dll" (ByVal CdsFileIndex As Long, ByVal ImgBuffer As Long, ByVal ImgBufLen As Long, ByVal vcode As String) As Boolean
Private Declare Function LoadCdsFromFile Lib "AntiVC.dll" (ByVal FilePath As String) As Long
Private Declare Function GetVcodeFromFile Lib "AntiVC.dll" (ByVal CdsFileIndex As Long, ByVal FilePath As String, ByVal vcode As String) As Boolean
Private Declare Function GetVcodeFromURL Lib "AntiVC.dll" (ByVal CdsFileIndex As Long, ByVal ImgURL As String, ByVal vcode As String) As Boolean
Private Declare Function GetVcodeFromHWND Lib "AntiVC.dll" (ByVal CdsFileIndex As Long, ByVal HWND As Long, ByVal lpRect As Long, ByVal vcode As String, ByVal DebugMode As Long) As Boolean【什么意思？】

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Answer 1

声明 API

追问

非常感谢您的回答，能具体点吗？(╯﹏╰)b

追答

就是 VB调用外部API函数时需要先声明下。
具体到每个函数的意思，查找相关资料。API函数成千上万，没有一个人都能明白他的实际意义，只要会调用就可以了