Issues in MFC - SDI Splitter window application

Question

Hi,

I am writing a SDI Spliter wnd application in vc++ 6.0.  I have overrided the OnCreateClient function as follows,

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
 // TODO: Add your specialized code here and/or call the base class

 char errorText[256];
 CException ex;
 try
 { 
  m_wndSplitter.CreateStatic(this, 1, 2, WS_CHILD | WS_VISIBLE ,AFX_IDW_PANE_FIRST);
 
 }
 catch(...)
 {
  ex.GetErrorMessage(errorText,255,0);
  MessageBox(errorText,"Exception Error",0);
 }
 try
 { 
  m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CFormLeft), CSize(280, 100), pContext);
  m_wndSplitter.CreateView(0, 1, RUNTIME_CLASS(CFormRight), CSize(100, 100), pContext);  
 }
 catch(...)
 {
  ex.GetErrorMessage(errorText,255,0);
  MessageBox(errorText,"Exception Error",0);
 }
 
 return CMDIFrameWnd::OnCreateClient(lpcs, pContext);
}

But if I built it, It shows warnings as follows

--------------------Configuration: Split2 - Win32 Debug--------------------
Compiling...
MainFrm.cpp
Linking...
LINK : warning LNK4075: ignoring /INCREMENTAL due to /FORCE specification
FormRightCode.obj : warning LNK4006: "public: static class CObject * __stdcall CFormRight::CreateObject(void)" (?CreateObject@CFormRight@@SGPAVCObject@@XZ) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "public: virtual struct CRuntimeClass * __thiscall CFormRight::GetRuntimeClass(void)const " (?GetRuntimeClass@CFormRight@@UBEPAUCRuntimeClass@@XZ) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: __thiscall CFormRight::CFormRight(void)" (??0CFormRight@@IAE@XZ) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: virtual __thiscall CFormRight::~CFormRight(void)" (??1CFormRight@@MAE@XZ) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: virtual void __thiscall CFormRight::DoDataExchange(class CDataExchange *)" (?DoDataExchange@CFormRight@@MAEXPAVCDataExchange@@@Z) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: virtual struct AFX_MSGMAP const * __thiscall CFormRight::GetMessageMap(void)const " (?GetMessageMap@CFormRight@@MBEPBUAFX_MSGMAP@@XZ) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: virtual void __thiscall CFormRight::AssertValid(void)const " (?AssertValid@CFormRight@@MBEXXZ) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: virtual void __thiscall CFormRight::Dump(class CDumpContext &)const " (?Dump@CFormRight@@MBEXAAVCDumpContext@@@Z) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "protected: static struct AFX_MSGMAP const CFormRight::messageMap" (?messageMap@CFormRight@@1UAFX_MSGMAP@@B) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "private: static struct AFX_MSGMAP_ENTRY const * const CFormRight::_messageEntries" (?_messageEntries@CFormRight@@0QBUAFX_MSGMAP_ENTRY@@B) already defined in FormRight.obj; second definition ignored
FormRightCode.obj : warning LNK4006: "public: static struct CRuntimeClass const CFormRight::classCFormRight" (?classCFormRight@CFormRight@@2UCRuntimeClass@@B) already defined in FormRight.obj; second definition ignored
Debug/Split2.exe : warning LNK4088: image being generated due to /FORCE option; image may not run
Creating browse info file...

Split2.exe - 0 error(s), 13 warning(s)

Please some one help me to solve it.  for the mean time, I put FORCE option for development.  But even now it is working only in Debug mode not in Release Mode.

Regards,

Ganesan.

---

Thanks & Regards, Ganesan Chandrasekaran.

Answer 1

The linker is finding two definitions for functions and message maps. Maybe you have things in the .h file that belong in the cpp file?  The .h file is #included in multiple places, so anything it defines gets created multiple times. If you can't figure it out show us the formright.h file.

And remove the /FORCE command. It serves no useful purpose here.

Answer 2

Thanks Scott,

You are right and I solved it....

Regards,

Ganesh.

---

Thanks & Regards, Ganesan Chandrasekaran.