>It would be helpfull if you post your code and the sample code that comes with the COM object.

Sure. The following VFP code crashes on the last line where I try to get goBar:

LOCAL lcSymbol
lcSymbol="IBM"

PUBLIC goESignal
goESignal=NEWOBJECT("IESignal.Hooks")
goESignal.SetApplication ("**********") && UserID
goESignal.RequestSymbol(lcSymbol,.T.)

LOCAL lnHistory
lnHistory=goESignal.RequestHistory(lcSymbol,"D", 1, 20, -1, -1)

PUBLIC goBar as IESignal.BarData
goBar=goESignal.GETBAR(lnHistory,1)

The example code from the vendor was in VB. I extracted the following. It runs correctly in VB6:

Dim WithEvents eSignal As IESignal.Hooks
Private Sub cmdRequestHistory_Click()
    
    Dim sLastSymbol As String
    Dim lHistoryHandle As Long
    Dim lLastHistoryCount As Long
  
    Set eSignal = New IESignal.Hooks
    eSignal.SetApplication ("peterbennett")
    
    Dim sSymbol As String
    
    sSymbol = "SIRI"
    
    If lHistoryHandle <> 0 Then
        eSignal.ReleaseHistory lHistoryHandle
        lHistoryHandle = 0
        lLastHistoryCount = 0
    End If
    
    lstHistory.Clear
    
    lHistoryHandle = eSignal.RequestHistory(sSymbol, "D", 2, 20, -1, -1)
    
    Dim BarItem As IESignal.BarData
    BarItem = eSignal.GetBar(lHistoryHandle, -10)
    
    Dim sRet As String
    sRet = Str$(BarItem.dtTime)
    sRet = sRet + ": " + Str$(BarItem.dOpen)
    sRet = sRet + ", " + Str$(BarItem.dHigh)
    sRet = sRet + ", " + Str$(BarItem.dLow)
    sRet = sRet + ", " + Str$(BarItem.dClose)
    Text1.Text = sRet

End Sub

The structure I'm trying to get back is of type IESignal.BarData
which is defined as:

Bar Time             datetime
Open                 double
High                 double
Low                  double
Close                double
Volume               double
Open Interest        double
Bar Flags            bit
Bid                  double
Ask                  double
Trade                double

Thanks