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11/04/2009 at 10:10AM PST, ID: 24871833

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8.8

VBA type mismatch error in custom data structure

Asked by alainbryden in Visual Basic Programming, Microsoft Excel Spreadsheet Software, Microsoft Access Database

Hey. I've created a custom data structure that is supposed to be able to store anything. It uses a collection.

When inserting an item, I used the following:
Private main As New Collection
Public Sub Add(ByRef obj As Variant, ....)
...
main.Add obj, "key"

When retrieving the item, I try to use the following:
Public Function Item(...) As Variant
Set Item = main.Item("key")

This works fine if I am storing a set of objects in my data structure, but as soon as I try to store something like a String, the line "Set Item = ...." fails.

This appears to be because (main.Item("key")) resolves to a "Variant/String" and VBA will not let me use the "Set" keyword on a string.

By removing "Set" the data structure works for strings, but no longer works for objects - I get "object variable or with block variable not set".

How can I design my data structure so that it will work on any type, objects, strings, arrays, etc? The native VBA Collection seems to able to do it, why can't I?

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20090824-EE-VQP-74 - Hierarchy / EE_QW_3_20080625

1. Idle_Mind410,491
2. GrahamSkan326,281
3. matthews...300,312
4. rorya211,270
5. egl1044194,495
6. game-ma...180,110
7. BlueDevilF...179,005
8. angelIII160,814
9. chris_bot...157,700
10. emoreau154,555
11. Dhaest149,563
12. brettdj144,460
13. jpaulino141,042
14. webtubbs115,564
15. robberbaron109,230
16. saurabh726103,610
17. abel102,440
18. aikimark93,438
19. HooKooD...89,703
20. PaulHews89,680
21. CodeCruiser78,709
22. tbsgadi72,442
23. RobSamp...72,030
24. LSMCons...71,820
25. danaseaman70,600

1. Idle_Mind2,287,871
2. GrahamSkan1,937,269
3. PaulHews1,553,328
4. angelIII1,466,749
5. AzraSound1,400,747
6. matthews...1,384,590
7. emoreau1,285,372
8. vinnyd791,242,790
9. Erick371,211,724
10. EDDYKT1,171,292
11. BlueDevilF...1,103,307
12. TimCottee1,023,616
13. egl1044951,241
14. ryancys901,139
15. Ark878,052
16. Shauli718,021
17. rorya712,131
18. zorvek698,863
19. sirbounty698,386
20. Dhaest628,965
21. RobSamp...583,847
22. danaseaman582,994
23. jpaulino573,727
24. zzzzzooc552,977
25. inthedark531,097

VBA type mismatch error in custom data structure

Asked by alainbryden in Visual Basic Programming, Microsoft Excel Spreadsheet Software, Microsoft Access Database

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