I've been tasked with making a change to a legacy VB6 Winform app. What I found is that this app was unnecessarily split up into multiple DLLs (some of the DLL were simply a couple of classes). So, I'm working on consolidating some of the DLLs into the main program but I've run into a problem that I could use some help on.
One of the dlls contained a class called CTest(Test.cls). The main program used it in the following lines of code. strProgId is a string naming another DLL.
Dim objTest As CTest
Set objTest = CreateTestObject(strProgId)
Public Function CreateTestObject(strProgId As String) As Object
10 On Error GoTo ErrorHandler
20 Set CreateTestObject = CreateObject(strProgId)
30 Exit Function
ErrorHandler:
40 UpdateErrorInfo "CreateTestObject", "Globals", strProgId
50 HandleError
End Function
Here are the contents of CTest
Option Explicit
Private m_strName As String
Private m_strDescription As String
Private m_cnnADO As ADODB.Connection
Public Property Get Name() As String
10 Name = m_strName
End Property
Public Property Let Name(strNewName As String)
10 m_strName = strNewName
End Property
Public Property Get Connection() As ADODB.Connection
10 Set Connection = m_cnnADO
End Property
Public Property Set Connection(cnnADO As ADODB.Connection)
10 Set m_cnnADO = cnnADO
End Property
Public Property Get Description() As String
10 Description = m_strDescription
End Property
Public Property Let Description(strNewDescription As String)
10 m_strDescription = strNewDescription
End Property
Public Function Run(ByVal strSTMType As String, _
instInstruments As CInstruments, objResults As CTestResults) As Boolean
End Function
If CTest is still part of a DLL and I have a reference to it in the Main Program, it gets through the CreateTestObject line without an error. If I bring in the class into the main program it throws a type mismatch error.
Any help is appreciated, thank you in advance.
CreateObject will only work with publicly visible COM classes. Therefore, because you've brought CTest into your main program, CreateObject will no longer work and will raise errors just like you describe.
Either