About the useness of SetCheck

[sunny_sz]

Hello everyone :

I am doing one application for the SetCheck(); and found one problem occured , that is :

Sometimes I used ((CButton *)GetDlgItem(nID))->SetCheck(1) , that can work successfully and no any erro , but sometimes I use the sme one at somewhere, then get erro as below :

error C2660:'GetDlgItem' : function does not take 1 parameters
error C2227: left of '->SetCheck' must point to class/struct/union

I also try to use :

CWnd *pwnd=GetDlgItem(nID);
(CButton *)pwnd->SetCheck(1);

also get erro :

error C2660: 'GetDlgItem' : function does not take 1 parameters
error C2039: 'SetCheck' : is not a member of 'CWnd'
e:\Visual Studio\VC98\MFC\INCLUDE\afxwin.h(1899) : see declaration of 'CWnd'

I am in doubt now , and Could anyone give me any idea ?

Thanks in advance !

[torfil]

GetDlgItem is a member of CWnd. Are you sure you're calling it from a non-static method of a class derived from CWnd?
If not, then you're calling the 2 parameter version of GetDlgItem, which takes an hwnd in addition to a control id.

Also, in this case:

CWnd *pwnd=GetDlgItem(nID);
(CButton *)pwnd->SetCheck(1);

it should be:

CWnd *pwnd=GetDlgItem(nID);
((CButton *)pwnd)->SetCheck(1);

... although that's not the problem in your case.

[sunny_sz]

Sorry for my stupid inattention , but if

CWnd *pwnd=GetDlgItem(nID);
((CButton *)pwnd)->SetCheck(1);

then

error C2660: 'GetDlgItem' : function does not take 1 parameters

How to settle this case ?

pls. advise !

Thx in advance !

[Vinod S]

Mr torfil has already narrated the cause of the error you are getting. You may be calling the function from some classes which are not drived from CWindow or CWnd or any of the classes derived from these.

at these places you can call the function as follows.

HWND GetDlgItem(
HWND hDlg, // handle to dialog box
int nIDDlgItem // control identifier
);

you can get its help from MSDN.

[sunny_sz]

Mr torfil has already narrated the cause of the error you are getting. You may be calling the function from some classes which are not drived from CWindow or CWnd or any of the classes derived from these.

at these places you can call the function as follows.

HWND GetDlgItem(
HWND hDlg, // handle to dialog box
int nIDDlgItem // control identifier
);

you can get its help from MSDN.

Thanks for all post , I have settle this case .

Appreciate any help .