Shoutbox

I would like to know why this works:

code:

---

var WndManageFiles = null;
var WndAddFile = null;

WndManageFiles = MsgPlus.CreateWnd("GUI.xml", "WndManageFiles");
WndAddFile = MsgPlus.CreateWnd("GUI.xml", "WndAddFile");

---

whereas, this does not:

code:

---

var WndManageFiles = null;
var WndAddFile = null;

WndManageFiles = MsgPlus.CreateWnd("GUI.xml", "WndManageFiles");
WndAddFile = MsgPlus.CreateChildWnd("WndManageFiles", "GUI.xml", "WndAddFile", 100, 40, true);

---

Debugging console:

Error : Type mismatch.
Line : 22. Code : -2146828275.

Is there something that must be done differently in the .xml file?

Thank you in advance!