Re: Passing UDT from VB 6.0 to C++ DLL

[user65536]

I have the same problem as this topic.

here is the DLL info.

extern "C" __declspec(dllexport) int GetHash(HASHINFO*);

typedef struct {
        unsigned char* pHash;      // Address of buffer for saving hash
        unsigned char* szPassword; // Password
        int nPasswordLen;          // Password length
        unsigned char* szSalt;     // Salt
        int nSaltLen;              // Salt length
        unsigned char* szName;     // User name
        int nNameLen;              // User name length
        DWORD dwFlags;             // Flags
} HASHINFO;

Here is the VB

Private Type HASHINFO
   hash As String
   szPassword As String * 10
   nPasswordLen As Long
   szSalt As String * 10
   nSaltLen As Long
   szName As String * 10
   nNameLen As Long
   dwFlags As Long
End Type

Private Declare Sub GetHash Lib "c:\md5\md5.dll" (ByRef pudt As HASHINFO)

Private Sub Command1_Click()
Dim udt As HASHINFO
   udt.hash = vbNullString
   udt.szPassword = "test" & Chr(0)
   udt.nNameLen = 4
   udt.szSalt = "test" & Chr(0)
   udt.nSaltLen = 4
   udt.szName = "test" & Chr(0)
   udt.nNameLen = 4
   udt.dwFlags = 0
Call GetHash(udt)
End Sub

I just get a crash.

Anyone out there to help me?