InvokeHelper

Vi2

"result" variable is uninitialized.

With best wishes, Vita

MsmVc

Thanks for reply. But result variable is initialize here

VARIANT result;

Sorry can you describe more.

Vi2

No, this is uninitialized variable. But it doesn't help as I see the code of MFC. So, I think that VTS_PI1 is unapplicable here. Use VTS_PUI1 or VTS_PI4.

With best wishes, Vita

MsmVc

Ok i use

VTS_PUI1 or VTS_PI4.

both now error is same. If you need example code then i will give you.I need help.

Vi2

What declaration of method 0x60030002 do you have? What is a "Test objXl"?

With best wishes, Vita

MsmVc

See i don't much about InvokeHelper.I had download a project from Codeproject and make new project with the help of downloaded project.I am sending you a project link which have example code and Dll. Link is here Automating Microsoft Excel and Word Together[^] I am creating a new dll and write a new function.

Public Function Get_List(SheetNumber As Long) As String
' Dim myExcel As Object
Dim Counter1 As Integer
Dim Returnstring As String
Dim myWorkBook As Excel.Workbook
Dim tworksheet As Excel.Worksheet

' myExcel = CreateObject("Excel.Application")
' myWorkBook = myExcel.Workbook.Open("C:\sample.xls")

    For Each tworksheet In myWorkBook.Worksheets
'        Me.ListBox1.Items.Add (tworksheet.Name)
Returnstring = tworksheet.Name
If iindex = Counter1 Then
Get\_List = Returnstring

End If
Counter1 = Counter1 + 1
    Next

End Function
And try to access in vc++.Then i am getting error

Plz help me

Vi2

Sorry, it requires so much time which I don't have. Try to call the simpler function, for example,

Public Function Get_List(SheetNumber As Long) As String
Get_List = "aaa"
End Function

With best wishes, Vita

MsmVc

i am doing something wrong.See I add function in Dll

Public Function Get_List(SheetNumber As Long) As String
Get_List = "aaa"
End Function

And Declaration in m2msofficecom.h file

VARIANT Get_List(long* number);

And Define in m2msofficecom.cpp

VARIANT _clsExcel::Get_List(long* number)
{
VARIANT result;
static BYTE parms[] =
VTS_PI4;
InvokeHelper(0x60030002, DISPATCH_METHOD, VT_VARIANT, (void*)&result, parms,
number);
return result;
}

And Call in MainDlg Class

_clsExcel objXl;
long ty=1;
objXl.Get_List(&ty);

but still i am getting same error. plz help me.

Vi2

I can only propose that 0x60030002 is not Get_List function. You can look at DLL by "Ole/COM Viewer" and find the declaration of _clsExcel interface. Can you post the direct reference to your DLL?

With best wishes, Vita

MsmVc

please explain in detail.i am also think about 0x60030002 is not Get_List function.But how can i find it.

Vi2

VB creates the DLL, which has a TLB inside. Run the "OLE/COM Viewer" and File -> View TypeLib.... Perhaps there is a MFC Wizard which also can import this TLB into code. But I don't know about it, because I use #import directive in C++ client code.

With best wishes, Vita

MsmVc

ok i am trying to do that.

MsmVc

Thanks for smart ans.. Problem solved.

Lost User

:)