Can not add bitmap image as background in C++ MFC button control

Hello,

I can not add a bitmap as background on a Button Control in C++, MFC. I am using Visual Studio 2005.
I have set the button property "Bitmap" to true, and I am using the code below in
BOOL Ceduinst5Dlg::OnInitDialog(), but the button stil does not have the bitmap as a background.
I have tried adding the same code to BN_CLICKED event, then calling Invalidate(), but it again does not work.
What can I do to solve this problem?

Thanks,
Alex

CButton *pWnd = (CButton *) Ceduinst5Dlg::GetDlgItem(IDC_BUTTON1);
pWnd->SetBitmap(::LoadBitmap(NULL, MAKEINTRESOURCE(IDB_BITMAP1)));

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