[C++]GetOpenFileName Problem

#include <Windows.h>
#include <detours.h>

typedef BOOL (__stdcall* GetOpenFileName_DetourType)(LPOPENFILENAMEW lpOpfn);
GetOpenFileName_DetourType GetOpenFileName_Orig;

BOOL __stdcall GetOpenFileName_Detour(LPOPENFILENAMEW lpOpfn)
{
	return GetOpenFileName_Orig(lpOpfn);
}


BOOL WINAPI DllMain(HINSTANCE hiDLL, DWORD dwReason, LPVOID lpReserved)
{
	switch(dwReason) 
	{ 
	  case DLL_PROCESS_ATTACH:
		GetOpenFileName_Orig = reinterpret_cast<GetOpenFileName_DetourType>(DetourFunction((PBYTE)GetOpenFileName, (PBYTE)GetOpenFileName_Detour));
	  	return TRUE;

	  case DLL_PROCESS_DETACH:
		return TRUE;
	}
}

#include <Windows.h>
#include <detours.h>

typedef BOOL (__stdcall* GetOpenFileName_DetourType)(LPOPENFILENAMEW lpOpfn);
GetOpenFileName_DetourType GetOpenFileName_Orig;
		  


UINT CALLBACK OFNHookProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	MessageBox(0, "LALAAL", "1", 0);
    switch (uMsg)
    {
        case WM_INITDIALOG:
		{
			MessageBox(0, "LALAAL", "2", 0);
			return 1;
		}
    }
}


BOOL __stdcall GetOpenFileName_Detour(LPOPENFILENAMEW lpOpfn)
{
	OPENFILENAME ofn;
	ZeroMemory(&ofn, sizeof(OPENFILENAME)); 
	ofn.lStructSize = sizeof(OPENFILENAME);
	ofn.nMaxFile = MAX_PATH;
	ofn.hwndOwner = NULL;
	ofn.Flags = OFN_ENABLEHOOK|OFN_EXPLORER;
	ofn.lpfnHook = OFNHookProc;
	return GetOpenFileName(&ofn);
}


BOOL WINAPI DllMain(HINSTANCE hiDLL, DWORD dwReason, LPVOID lpReserved)
{
	switch(dwReason) 
	{ 
	  case DLL_PROCESS_ATTACH:
		GetOpenFileName_Orig = reinterpret_cast<GetOpenFileName_DetourType>(DetourFunction((PBYTE)GetOpenFileName, (PBYTE)GetOpenFileName_Detour));
	  	return TRUE;

	  case DLL_PROCESS_DETACH:
		return TRUE;
	}
}

BOOL __stdcall GetOpenFileName_Detour(LPOPENFILENAMEW lpOpfn)
{
    OPENFILENAME ofn;
    ZeroMemory(&ofn, sizeof(OPENFILENAME)); 
    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.nMaxFile = MAX_PATH;
    ofn.hwndOwner = NULL;
    ofn.Flags = OFN_ENABLEHOOK|OFN_EXPLORER;
    ofn.lpfnHook = OFNHookProc;
    return GetOpenFileName(&ofn);
}

BOOL __stdcall GetOpenFileName_Detour(LPOPENFILENAMEW lpOpfn)
{
    lpOpfn->lStructSize = sizeof(OPENFILENAME);
    lpOpfn->nMaxFile = MAX_PATH;
    lpOpfn->hwndOwner = NULL;
    lpOpfn->Flags = OFN_ENABLEHOOK|OFN_EXPLORER;
    lpOpfn->lpfnHook = OFNHookProc;

    return GetOpenFileName(lpOpfn);
}