VB6.0开发，调用了DLL中的方法去获取两个字符串，但实际返回字符串的地址。

怎样从地址得到完整的字符串内容呢？方法如下，核心是oleaut32.dll中的SysAllocStringByteLen方法：

Private Declare Function SysAllocStringByteLen Lib "oleaut32.dll" (ByVal m_pBase As Long, ByVal l As Long) As String
Private Declare Function lstrlen Lib "kernel32.dll" Alias "lstrlenA" (ByVal lpString As Long) As Long' This function is called from the dll
' pName and pId is address, a number
Public Function callBack(ByVal pName As Long, ByVal pId As Long) As LongMsgBox ("pName is: " & pName & "   " & "pId is: " & pId)Dim deviceName As String
Dim deviceId As String
deviceName = SysAllocStringByteLen(pName, lstrlen(pName))
deviceId = SysAllocStringByteLen(pId, lstrlen(pId))MsgBox (deviceName & "  " & deviceId)End Function

效果：

参考：如何在VB中从long指定的地址中获取字符串-腾讯云开发者社区-腾讯云