How to enable/disable a groupbox

[martijnF]

Hi there!

I want to enable/disable a group box.

Since a groupbox is in fact a CButton I thought that it would be easy using code like:

GetDlgItem(IDC_GROUPBOX)->EnableWindow(true);
or
CButton* grb = (CButton*) GetDlgItem(IDC_GROUPBOX);
grb->EnableWindow(true);

I even tried a CWnd* in stead of a CButton*, but every time the EnableWindow function returns an error, stating that the groupbox is not a window and thus cannot be enabled/disabled.

I must be doing something terribly wrong...but WHAT????

Regards,

Martijn

 

[DavesTips]

Maybe doesn't help too much, but both your methods work fine for me... Hope that this helped!

 

[hcexi]

Hi,
It seems to me, that you are trying it wrong time. ( before creation or after destrying of HWND of underlying window )
It is in dialog try it in OnInitDialog.
Maybe this could be the point.

 

[martijnF]

The place I call the code above is in a dialog function that is invoked by OnInitDialog...
It must be something else, maybe some weird VC++ setting? B-(

By the way: I don't have the IDC_GROUPBOX mapped to a value or control (in DoDataExchange).

 

[DavesTips]

Doesn't matter with the code you're using, but that approach works too BTW.

Where is this code "called from OnInitDialog"? Hope that this helped!

 

[martijnF]

I guess you want to know whether I call the code before or after the CDialog::OnInitDialog()...
Here's my OnInitDialog:

BOOL CDataConversionDlg::OnInitDialog()
{
CDialog::OnInitDialog();
//...
SetControlStates(); // <= this function calls the code
return TRUE;
}

void CDataConversionDlg::SetControlStates()
{
UpdateData();
//...
// Disable progress groupbox
GetDlgItem( IDC_GRBPROGRESS )->EnableWindow(false);

return;
}


It's abacadabra to me!

 

[DavesTips]

What exactly is the error? ASSERT IsWindow() in CWnd::EnableWindow()? Hope that this helped!

 

[martijnF]

Yep, that's him!

 

[DavesTips]

The obvious explanation is that your IDC_GRBPROGRESS is incorrect, maybe from another dialog or so? I suggest checking with the actual id in the properties for the control. Hope that this helped!