What I understand from my search is that the only way there is to interact with a TreeView control at the moment is to use the Win32 API? Is that correct? How would I go about say, adding a few options to a TreeView and detecting when there is a click done on one item (along with its ID/index)? (Those are the only things I would need to do with the control)

Is there a script in the DB that already does that? I could take a look at it since I'm self-taught.

Thanks for the help.

You need to subclass the window and fill the TVITEM structure normally from NMHDR. I have some code at home I can post if no one posts anything in the next while.

The attachment is taken from the Log Manager script by Matti.

Thanks, I'll take a look into that

I got it to work

However, I still need help with some API functions

In my code I am at the point where I know when TVN_SELCHANGED has happened.

I want to go further and get its NMTREEVIEW structure and from it, get the the TVITEM both from itemOld and itemNew. Then, I want to get the handle of both these TVITEM structures and I should have everything I need to do what I intend to do.

Thanks for helping me!

Do you know where I could find help for STRUCTS in JScript? It's kind of hard to ask help about this on other forums when it has to use the Plus! Interop and Databloc objects.

Thanks

There aren't any documented structures unless they are used in scripts (in which you need to then search the code).

Really your only option is to calculate the size itself.

Data types : Size

• Byte : 1
  
• Integer : 2
  
• Long : 4
  
• String : 4
  
• Variant : 8

I would need some help to get started with the NMTREEVIEW I talked about in my post above, here is what I have:

JScript code:

---

function OnWndSettingsEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
    switch (Message) {
        case WM_NOTIFY:
            var NMHDR = Interop.Allocate(12);
            Interop.Call('kernel32', 'RtlMoveMemory', NMHDR.DataPtr, lParam, 12);
            if (NMHDR.ReadDWORD(0) == PlusWnd.GetControlHandle("TrvSettingGroups")) {
                switch(NMHDR.ReadDWORD(8)) {
                    case TVN_SELCHANGEDW: case TVN_SELCHANGEDA:
                        //TreeView selection changed
 
                        Debug.Trace("TreeView selection changed:");
 
                        //Now I want to get the NMTREEVIEW structure and from it, get the the TVITEM both from itemOld and itemNew. Then, I want to get the handle of both these TVITEM structures
 
                        break;
                }
            }
            NMHDR.Size = 0;
            break;
    }
}

---

Javascript code:

---

function OnWndSettingsEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
    switch (Message) {
        case WM_NOTIFY:
            var NMHDR = Interop.Allocate(12);
            Interop.Call('kernel32', 'RtlMoveMemory', NMHDR.DataPtr, lParam, 12);
            if (NMHDR.ReadDWORD(0) == PlusWnd.GetControlHandle("TrvSettingGroups")) {
                switch(NMHDR.ReadDWORD(8)) {
                    case TVN_SELCHANGEDW: case TVN_SELCHANGEDA:
                        var NMTREEVIEW = Interop.Allocate(104);
                        Interop.Call('kernel32', 'RtlMoveMemory', NMTREEVIEW.DataPtr, lParam, 104);
                        /*
                            NMTREEVIEW
                                NMHDR : 0-12
                                Action : 12-16
                                TVITEM (itemOld) : 16-56
                                TVITEM (itemNew) : 56-96
                                POINT : 96-104
                        */
                        break;
                }
            }
            NMHDR.Size = 0;
            break;
    }
}

---

Javascript code:

---

function OnWndSettingsEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
    switch (Message) {
        case WM_NOTIFY:
            var NMTREEVIEW = Interop.Allocate(104);
            Interop.Call('kernel32', 'RtlMoveMemory', NMTREEVIEW.DataPtr, lParam, 104);
            if (NMTREEVIEW.ReadDWORD(0) == PlusWnd.GetControlHandle("TrvSettingGroups")) {
                switch(NMTREEVIEW.ReadDWORD(8)) {
                    case TVN_SELCHANGEDW: case TVN_SELCHANGEDA:
                        /*
                            NMTREEVIEW
                                NMHDR : 0-12
                                Action : 12-16
                                TVITEM (itemOld) : 16-56
                                TVITEM (itemNew) : 56-96
                                POINT : 96-104
                        */
                        break;
                }
            }
            NMTREEVIEW.Size = 0;
            break;
    }
}

---

After that, do I do

JScript code:

---

var itemOld = NMTREEVIEW.ReadDWORD(16);
var itemNew = NMTREEVIEW.ReadDWORD(56);

---

JScript code:

---

var hOldItem = NMTREEVIEW.ReadDWORD(20);
var hNewItem = NMTREEVIEW.ReadDWORD(60);

---

No problem!

Glad you got it working!