[RESOLVED] ListBox SelectedIndex in C#

[Jonney]

In .NET, ListBox has a very good feature to de-select all by .SelectedIndex =-1

From what I know, VB6's Listbox ListIndex just set or return Focus (not Selected), it is totally differ to .Net SelectedIndex.

Right now I coded .NET SelectedIndex = -1 in VB6 by two steps:
lstGoods.ListIndex = -1 'Get rid of Focus at first
Call SendMessage(lstGoods.hWnd, LB_SETSEL, 0, ByVal -1) 'De-select all

Question 1:
Is my above code for lstGoods.SelectedIndex = -1 right?

Question 2:
How to achieve the same thing for:
C#:
this.lstGoods().TopIndex = this.lstGoods().SelectedIndex

[LaVolpe]

#1: Yes. Here's the documentation. You can always look up the window message on MSDN to answer the question yourself. LB_SETSEL is used for multi-select listboxes. A single-select would just need the ListIndex = -1

Parameters
wParam
Specifies how to set the selection. If this parameter is TRUE, the item is selected and highlighted; if it is FALSE, the highlight is removed and the item is no longer selected.
lParam
Specifies the zero-based index of the item to set. If this parameter is –1, the selection is added to or removed from all items, depending on the value of wParam, and no scrolling occurs.

#2. VB's ListBox also has a TopIindex property

[Jonney]

#1: Yes. Here's the documentation. You can always look up the window message on MSDN to answer the question yourself. LB_SETSEL is used for multi-select listboxes. A single-select would just need the ListIndex = -1


#2. VB's ListBox also has a TopIindex property

Thanks. I forgot to look for MSDN but VBForums.

The problem is that SendMessage only works when no scrolling. If I didn't set lstGoods.ListIndex = -1 then SendMessage doesn't work.
An annoying focus remained after deselect all which is not what I want. C# Listbox doesn't have focus rect but just selected highlight.

One more question, ListBox/ComboBox have ugly plain selection highlight RECT. how to own-drawn Listbox selection with Themed selection like Win7 explorer? I don't know what parameter I should put for OpenThemeData or there's no such theme?

Edited:
If ListBox's MultiSelection is None,there's has focus. But If MultiSelection is Simple or Extend,there's no focus after deselect all.

[Nightwalker83]

Which language are you using? I assume it is VB6 but the way the originally post is written it is a bit unclear.

[Jonney]

Which language are you using? I assume it is VB6 but the way the originally post is written it is a bit unclear.

VB6.
I wrote a small project in C#, but now I want to wrote same thing in VB6 with some enhancement. But look like VB6 is harder. I have to look for APIs.