請問各位高手:
現在有一個Delphi寫的DLL,我需要用C#去呼叫並取得回傳值,
目前問題是我無法接收到正確PortInfo.sPortName[0].的值,是哪裡有問題呢?

Delphi中的程式如下(TEST.dll):
type
TPort_Information = record
iPortID : integer;
sPortName : pchar,
iPortType : integer;
end;

function Get_Info(var Port_Information:TPort_Information ) : integer ;
begin
Port_Information.iPortID:=0;
Port_Information.iPortType:=2;
Port_Information.sPortName[0]:=char(10);
result:=0;
end;

C#目前寫法為:
public struct TPort_Information
{
public int iPortID;
public char[] sPortName;
public int iPortType;
}
[DllImport("TEST.dll", EntryPoint = "Get_Info", CallingConvention = CallingConvention.StdCall)]
public static extern int m_Get_Info(ref TPort_Information fPort_Information);

private void button1_Click(object sender, EventArgs e)
{
TPort_Information PortInfo;
PortInfo.iPortID = 0;
PortInfo.iPortType = 0;
PortInfo.sPortName = new char[5];
PortInfo.sPortName[0] = 'A';
m_Get_Info(ref PortInfo);
}

function Get_Info(var Port_Information:TPort_Information ) : integer ; stdcall;

別忘了 stdcall！

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