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User DLL doesn't work when using CButton

I am trying to make a user DLL which includes the MFC derived class CButton (or really any MFC class). If I leave the CButton class out the dll runs great. As soon as I include the CButton member the executable causes a trap as soon as DoModal is called. Any ideas?

#define DLLAPI _declspec(dllexport)

class MyClass : CDialog
{
DECLARE_DYNAMIC(MyClass)
public:
DLLAPI MyClass();
DLLAPI DoModal();

CButton aBtn;
}

Re: User DLL doesn't work when using CButton

You probably need to see what is there in DoModal() - If you have overridden it or if you have something in the class which you have missed to initialize.

Re: User DLL doesn't work when using CButton

I don't think it's in DoModal. The program will show the dialog, but after returning and making a call to SetResourceHandle I get e run time error that says the stack around aDlg has been corrupted. The calling program and class header are below.

Code:

#define APIDLL _declspec(dllimport)



// aDialog dialog



class CModTest2Dlg: public CDialog

{



public:

        APIDLL CModTest2Dlg(CWnd* pParent = NULL);   // standard constructor

        APIDLL int DoModal();



};



int CModTest2Dlg::DoModal()

{

        CDialog::DoModal();

        return(0);

}

void CImportClassDlg::OnBnClickedBtnTest()

{

        CModTest2Dlg aDlg;

        // TODO: Add your control notification handler code here

                HINSTANCE hClientResources = AfxGetResourceHandle();

        AfxSetResourceHandle(::GetModuleHandle("MxModSim.dll"));

        aDlg.DoModal();



        AfxSetResourceHandle(hClientResources);

}

Re: User DLL doesn't work when using CButton

Try running in the debug mode and see where the program is crashing or giving any ASSERT.