Problem adding items to a listbox

[philrosenberg]

Hi all
This seems like it should be so easy yet I can't get it to work. I'm using microsoft visual c++ to create a dialog based application.
I've created one dialog box resource with a listbox in. Then added a CListBox object associated with it called m_list.
All I want to do is when the dialog opens have a list of various strings in the box so I'm doing something like.

CString String1 = "First list item"
CDlgList MyListDialog;
MyListDialog.m_list.AddString(string1);

however I'm getting a "debug assertion failed" error. Any ideas why, any help much appreciated.

 

[Zyrenthian]

I would guess that m_hWnd is null. Use the class wizard and associate the control with a variable name (member variables).

Matt

 

[Zyrenthian]

My bad... the m_hWnd = null would still be true but you should add the itmes in the "OnInitDialog" portion.

Matt

 

[philrosenberg]

thanks zyrenthian. I can use AddString in the OnInitDialog function so I'll pass the strings to member variable strings and then add them to the listbox when OnInitDialog is called.

As an additional point I get the same error during runtime if I try to use addString in the dialog box constructor. If anyone knows and has the time to explain I'd be curious to know why it doesn't work in the constructor and why I can't access the Clistbox object befor I call doModal like other member variables.