Hi Kevin,

Thanks a lot for the tips. Please see the VB codes below, I get the "Object variable or With block variable not set" error message when run:

The VFP dll
DEFINE CLASS mydll AS CUSTOM OLEPUBLIC

FUNCTION hithere
LPARAMETERS tcName as string

IF NOT EMPTY( tcName)
lcString = "Hi there "+tcName
ELSE
lcString = "Hi there Unknown"
ENDIF
RETURN lcString

ENDDEFINE

The VB codes

Private Sub command1_click()
Dim oDLL As mydll.mydll
Dim sString As String

sString = oDLL.hithere("John")
text1.text = sString
End Sub


Do you see any problem here?

KY