Error message: "Only user defined types define din public modules can be coerced to/f

[cappy2112]

the full message is as follows

"Only user defined types defined in public modules can be coerced to/from a variant or passed to late-bound functions."

I've defined a UDT in a class.

Private Type dblParam
Val As Double
name As String
desc As String
End Type


and instantiated it as such

Private mDbl As dblParam
dim dictFormatParams as New Dictionary

I have many of these, and want to add them to a containter object, a dictionary in this case.

During compile time, this line causes the error displayed at the top of this post

mDbl.name="Frequency"
mDbl.val = 1.0E-6

dictFormatParams.Add mDbl.name, mDbl <- dictionary- causes compile error messge (see top of this post)


I don't understand why VB can't deal with UDT's defined in a class
I don't want to move these variable instaniations outside of the class, it defeats the whole purpose of using a class.

[Comintern]

Couple of options here. First (my personal preference) would be to get rid of the UDT passing and create a class describing the UDT and passing that back and forth instead. Second, if you must, you can do something like this: Make the type definition private in both the calling module and the class, and then pass it as a null delimited string. You'll need a function in the class to build the string and a function in the module to rebuild it into the UDT. I.e.

'Outside the class.
Private Function LoadType(sReturn As String) As dblParam

    Dim sTemp() As String, uOut As dblParam
    
    sTemp = Split(sReturn, Chr$(0))
    uOut.Val = CDbl(sTemp(0))
    uOut.name = sTemp(1)
    uOut.desc = sTemp(2)
    
    LoadType = uOut
    
End Function

'Inside the class.
Public Function ReturnsUDT() As String

    Dim sOut As String, uTemp As dblParam
    
    uTemp = Whatever
    sOut = CStr(uTemp.Val) & Chr$(0) & uTemp.name & Chr$(0) & uTemp.desc
    
    ReturnsUDT = sOut

End Function

'Call it like this:
uVariable = LoadType(Class.ReturnsUDT)

[cappy2112]

Couple of options here. First (my personal preference) would be to get rid of the UDT passing and create a class describing the

I see the light now.

Thanks!