How to access controlls on dialog bar?

[MrSandman666]

Hi guys.

It's been a while but still feels good to be back again. I'm slowly picking up programming again and right now I'm trying to get an MDI application together, which includes a few dialog bars. I'm an absolute newbie when it comes to MFC, so please be kind.
I know how to create and midify the Dialog Bar and I know how to process events from the controlls contained in it. However, till now I've had no luck whatsoever in actually accessing these controlls. I can not read the value of an edit controll or change it's properties. I can't populate a treeview, etc. Well, you get the idea.
I'm currently doing this:

void CMainFrame::OnRolldice()
{
CString Result;
CEdit* cNumberOfDice = (CEdit*)GetDlgItem(IDC_DR_DICE);

int len = cNumberOfDice->LineLength(cNumberOfDice->LineIndex(0));
cNumberOfDice->GetLine(0, Result.GetBuffer(len), len);
Result.ReleaseBuffer(len);

MessageBox(Result);
}

This works, except for the fact that GetDlgItem always returns NULL! Therefore, I get an access violation each time I run this code.

Any help? Please?

 

[MrSandman666]

Oh yeah, I forgot to mention:
I can not assign member variables to the controlls, as would be expected. Since the Dialog Bar doesn't have it's own class derived, like a FormView would, it doesn't show up in the class wizard.

 

[palbano]

>> Since the Dialog Bar doesn't have it's own class
>> derived, like a FormView would, it doesn't show up in
>> the class wizard.

make a class for the dialog (using Class Wizard). You are in control. Resistance is futile.

-pete

 

[MrSandman666]

The problem is that you usually don't derive classes from the CDialogBar class.
And the class wizard doesn't support deriving from CDialogBar either. Of course, I could do it manualy but there has to be another way!

 

[MrSandman666]

Alright, never mind! I found the solution in another forum. I guess this is a typical newbie-fault.
Of course, it has to look like this:
CEdit* cNumberOfDice = (CEdit*)m_wndDlgBar.GetDlgItem(IDC_DR_DICE);

 

[palbano]

Yeah that works. You can create a CDialog class for the resource using class wizard and then use search and replace to change "CDialog" to "CDialogBar" and you then have a class for the dialog bar. You can create member variables using class wizard etc.

-pete