Enumerating Properties of Controls

[Zvoni]

I've been playing with Typelib Information (TBLINF32.DLL) to enumerate the Properties of all the Controls on a Form and determine whether specific ones are Read only.

From what I curently understand, a Prop.InvokeKind of 2 (INVOKE_PROPERTYGET) means it's a Readable property and a Prop.InvokeKind of 4 (INVOKE_PROPERTYPUT) means it's Writeable.

The issue is that, for example, the 'Height' property of a ComboBox is read only, yet the results above suggest it's Read/ Write. If you note, the ListIndex Property does not have a Prop.InvokeKind of INVOKE_PROPERTYPUT which is what I would expect.

Am I missing something or is there a 'better' way to achieve the objective? (apart from attempting to assign a value to the Property and using in-line Error Handling to trap errors)

BTW The overall objective is to attempt to build a 'generic' Form Resize Class / Module (yes,I know it's been done a thousand times before, but I've never done it- this is an exercise for me rather than anything 'useful') and in order to do so it's required to be able to identify whether a particular Property exists (e.g.Height) and whether it's writable.

How do you figure, that Height would be read-only for a combobox? Or that you would expect that ListIndex is read-only, since in your example above i can clearly see a LISTINDEX 4, which suggests writable. Or did you mean ListCount?
I've been setting Height and ListIndex for a ComboBox during Runtime since Adam & Eve...