Invoking a dialog from MFC dll.

[reachb4]

I have coded a function like below hoping that it will show a dialog on a key press. but for some reasons it is not showing up. This code is written inside a MFC Dll. Can you help me in pointing out the problem?

The installhook is called from a mfc dialog. Also, when i give SetParent as foreground window it ends up in an assertion failure.

LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, 
                            LPARAM lParam)
{
	AFX_MANAGE_STATE(AfxGetModuleState());
	AfxSetResourceHandle(AfxGetInstanceHandle());

    char ch;            
     if (HC_ACTION==nCode)
    {        
        if ((wParam==VK_SPACE)||(wParam==VK_RETURN)||(wParam>=0x2f ) &&(wParam<=0x100)) 
        {
           /
			
	 // HWND hWnd = GetForegroundWindow();
		   //dlg.SetParent(CWnd::FromHandle(hWnd));
		  
              CMfcDialog dlg;
             dlg.SetParent(CWnd::FromHandle(hWnd));
		   dlg.DoModal();
				
        }
    }

    LRESULT RetVal = CallNextHookEx( hkb, nCode, wParam, lParam );
    return  RetVal;
}

extern "C" void __declspec(dllexport) installhook()
{
  
	hkb=SetWindowsHookEx(WH_KEYBOARD_LL,(HOOKPROC)KeyboardProc,AfxGetInstanceHandle(),0);
  
}

[VictorN]

LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, 
                            LPARAM lParam)
{
	AFX_MANAGE_STATE(AfxGetModuleState());
	AfxSetResourceHandle(AfxGetInstanceHandle());

    ...
		  
              CMfcDialog dlg;
             dlg.SetParent(CWnd::FromHandle(hWnd));
		   dlg.DoModal();
				
     ...
    return  RetVal;
}

1. Well, you cannot SetParent for the CMfcDialog dlg; because this dlg is not a window yet!
You should instead set a parent from within CMfcDialog::OnInitDialog method and pass parent handle as a parameter or member variable of CMfcDialog class.

2. You are calling

AFX_MANAGE_STATE(AfxGetModuleState());

from within LRESULT CALLBACK KeyboardProc(...). Is this pocedure in a MFC Regular dll?

[reachb4]

Thank you so much for your help.

I first tried normal win32 dll and secondly the MFC Dll. Neither proved a success.

[VictorN]

Thank you so much for your help.

I first tried normal win32 dll and secondly the MFC Dll. Neither proved a success.

You haven't answer my question:

...
2. You are calling

AFX_MANAGE_STATE(AfxGetModuleState());

from within LRESULT CALLBACK KeyboardProc(...). Is this pocedure in a MFC Regular dll?

Otherwise it is not clear why you are calling AFX_MANAGE_STATE(AfxGetModuleState()) there...

[reachb4]

Sorry,

Yes it is in a MFC Regular Dll(MFC Shared).


Thanks,
Joe.

[VictorN]

Well, did you try to debug it? What does

	AfxSetResourceHandle(AfxGetInstanceHandle());

return? Is it the dll instance where your CMfcDialog is defined?

[reachb4]

Nope, lpszcurrentname is the name of the Dialog application i created. Why is it so??


Thanks and Regards,
John.

[VictorN]

Nope, lpszcurrentname is the name of the Dialog application i created. Why is it so??

Ask MSDN about it!

[reachb4]

Sure.. Thank you for your help so far.