Convert VBA code to C#

[danmoran]

I have VBA code calling an external dll file, within the dll exist method "getErrorCode".

I would like to know how I should call the dll file from C#.

Private Declare Function getErrorCode Lib "c:\master.dll" (ByVal F1 As String, ByVal F2 As Long, ByVal F3 As Long) As Long
 

with in my code I call the method getErrorCode like this

ErrCode = getErrorCode(fileName, 13, 1)
 

thanks in advance
Daniel

[GaryTexmo]

I think it might be...

[DllImport("<DLL NAME HERE>")]
<method declaration here>

Give that a try... google DllImport if it doesn't, I'm pretty sure that's what you need.

[danmoran]

@danmoran
Thanks for your prompt response. I tried the DLLImport but for some reason I can get it to work. I came with the following code.

However; I can't get the method to return an errorCode number.

        [DllImport("c:\\Program Files\\DHI\\Calibration\\muEpanet2.dll")]
        static extern long MUEpanet_RES_Load2Mem_InitHeader(ref string F1, ref long F2, ref long F3);
 
        [DllImport("c:\\Program Files\\DHI\\Calibration\\muEpanet2.dll")]
        static extern long MUEpanet_RES_GetTSCount();
 
        public UI()
        {
            InitializeComponent();
        }
        public iCommand myParent;
 
 
 
        private void UI_Load(object sender, EventArgs e)
        {
            long errorCode;
            string fileLocation = "c:\\MyFiles\\MU User Tool Turbidity\\base_zk-M1.res";
            long secondParameter = 13;
            long thirdParameter = 0;
            long count;
 
            count = MUEpanet_RES_GetTSCount();
 
 
            errorCode = MUEpanet_RES_Load2Mem_InitHeader(ref fileLocation, ref secondParameter, ref thirdParameter);
        }