HttpOpenRequestA函数的疑问

[cifueast]

Private Declare Function Http创建请求 Lib "wininet.dll" Alias "HttpOpenRequestA" (ByVal Internet连接句柄 As Long, 访问方式 As String, 页面路径 As String, 协议版本 As String, 引用页 As String, 识别类型 As String, ByVal dwFlags As Long, ByVal dwContext As Long) As Long


在调用这个api的过程中需要对其参数 dwFlags 传递数值2147483648.而vb中long类型最大长度是2147483647,所以无法调用,会发生溢出错误,不知道该任何解决...

HTTP请求句柄 = Http创建请求(Internet连接句柄, "", 页面地址, "HTTP/1.1", "", "", 2147483648#, 0)

[PctGL]

其实没必要过分追求形式上的数据类型, 你知道是2147483648 ,那就按long声明,直接传那个数就行了

[simon__sun]

2147483648 对应vb中long值应该是负值-2147483648
给你个转换算法

Public Function uLngToLng(uNo As Double) As Long
If uNo > 2147483647 Then
uLngToLng = uNo - 2147483647 - 2147483649#
Else: uLngToLng = uNo
End If
End Function