MI-L MI/MB: Getting values in a Type structure after calling a DLL

[Thomas Brix Lyng]

Hi Mappers

I have a custom DLL I call from MapBasic. It returns some information as a
TYPE structure. I can't seem to get hold of the values set by the DLL call:

Example:

Type MyReturnInfo
        Attribute1 as String
        Attribute2 as Integer
        Attribute3 as String
End Type

Declare Function DllFunction Lib "A_DLL" (Byval ID as Integer, ReturnValues
as MyReturnInfo) as Integer

Declare Sub Main

Sub Main
        Dim ResOK as Integer
        Dim MyLoocalReturnValues as MyReturnInfo

        ResOK=DllFunction(12223,MyLoocalReturnValues)

        If ResOK=0 Then
                Print "Attribute1="+MyLoocalReturnValues.Attribute1
                Print "Attribute2="+Str$(MyLoocalReturnValues.Attribute2)
                Print "Attribute3="+MyLoocalReturnValues.Attribute3
        End If
End Sub

I can't get it to work so the question really is: Is MapBasic in anyway
capable in handling return values from DLLs if they are Type structures?

PS: When I declare the DLL as ......MyReturnInfo as STRING...... I do get an
attribute, but only the first (Attribute1)!


Please adwice, Its really bugging me!

Regards

Thomas Brix Lyng
Frederikshavn Municipal Administration
Denmark

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Message number: 10512