CertSelectCertificate hook Callback Function does not get called

UINT WINAPI CertHookCallback( 
        HWND hDlg,
        UINT uiMsg,
        WPARAM wParam,
        LPARAM lParam)
{
          Trace(TRC_LOGIC, ("Callback function reached.\n"));
        if ( uiMsg == WM_SIZE) {

            // Center window and bring it to front
            Center(hdlg); 

         }

  return 0;
}

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#include <windows.h>
#include <wincrypt.h>
#include <stdlib.h>
#include "C:\Program\Microsoft SDKs\Windows\v6.0A\include\cryptdlg.h"


UINT WINAPI CertHookCallback(HWND hDlg,
							 UINT uiMsg,
							 WPARAM wParam,
							 LPARAM lParam)
{	
	if ( uiMsg == WM_SIZE) { 
		exit(0);
	}
	return NULL;
}

int WINAPI WinMain( __in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, __in_opt LPSTR lpCmdLine, __in int nShowCmd)
{
	HMODULE hLib = LoadLibrary(L"cryptdlg.dll");;	
	HCERTSTORE hTmpStore = CertOpenStore(CERT_STORE_PROV_MEMORY, PKCS_7_ASN_ENCODING | X509_ASN_ENCODING, 0, 0, NULL);	
	BOOL (WINAPI *pCertSelectCertificate)(PCERT_SELECT_STRUCT) = NULL;		
	pCertSelectCertificate = (BOOL (WINAPI *)(PCERT_SELECT_STRUCT))GetProcAddress(hLib, "CertSelectCertificateW");	
	
	CERT_SELECT_STRUCT certSelect;
	PCCERT_CONTEXT pSelCert = NULL;
	
	memset(&certSelect, 0, sizeof(CERT_SELECT_STRUCT));
	certSelect.dwFlags = CSS_ENABLEHOOK;
	certSelect.dwSize = sizeof(CERT_SELECT_STRUCT);
	certSelect.hwndParent = GetForegroundWindow();
	certSelect.pfnHook = (PFNCMHOOKPROC)CertHookCallback;
	certSelect.cCertStore = 1;  
	certSelect.arrayCertStore = &hTmpStore;
	certSelect.cCertContext = 1;  
	certSelect.arrayCertContext = &pSelCert;
	DWORD rc = pCertSelectCertificate(&certSelect);

	return 0;
}

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#include <afxwin.h>
#include <windows.h>
#include <wincrypt.h> 
#include <stdlib.h> 
#include <vector>
#include "C:\Program\Microsoft SDKs\Windows\v6.0A\include\cryptdlg.h" 
#define DIALOG_CLASS _T("#32770")

UINT WINAPI CertHookCallback(HWND hDlg, 
							 UINT uiMsg, 
							 WPARAM wParam, 
							 LPARAM lParam) 
{        
	exit(0);
	if ( uiMsg == WM_SIZE) {  
		exit(0); 
	} 
	return NULL; 
} 

bool g_run = true;


DWORD threadDlg = 0;
DWORD idapp = 0;
DWORD currThread = 0;
bool dialogFound = 0;

void CenterWindow(HWND hwnd)
{
	RECT    rect;
	LONG    dx, dy;
	LONG    dxParent, dyParent;
	LONG    Style;

	// Get window rect
	GetWindowRect(hwnd, &rect);

	dx = rect.right - rect.left;
	dy = rect.bottom - rect.top;

	// Get parent rect
	Style = GetWindowLong(hwnd, GWL_STYLE);
	if ((Style & WS_CHILD) == 0) {

		// Return the desktop windows size (size of main screen)
		dxParent = GetSystemMetrics(SM_CXSCREEN);
		dyParent = GetSystemMetrics(SM_CYSCREEN);
	} else {
		HWND    hwndParent;
		RECT    rectParent;

		hwndParent = GetParent(hwnd);
		if (hwndParent == NULL) {
			hwndParent = GetDesktopWindow();
		}

		GetWindowRect(hwndParent, &rectParent);

		dxParent = rectParent.right - rectParent.left;
		dyParent = rectParent.bottom - rectParent.top;
	}

	// Centre the child in the parent
	rect.left = (dxParent - dx) / 2;
	rect.top  = (dyParent - dy) / 3;

	// Move the child into position
	SetWindowPos(hwnd, HWND_TOPMOST, rect.left, rect.top, 0, 0, SWP_NOSIZE);

}

BOOL CALLBACK FindDialog(HWND hwnd, LPARAM lparam)
{
	TCHAR name[MAX_PATH];
	ZeroMemory(name, sizeof(name));

	GetClassName(hwnd, name, MAX_PATH);

	// See if this is a dialog window
	if(_tcscmp(name, DIALOG_CLASS) == 0){						
		
		// Check if this app is the creator of the window.
		DWORD idOfCreator = 0;
		GetWindowThreadProcessId(hwnd,&idOfCreator);
		if(idOfCreator == lparam)
		{
			CenterWindow(hwnd);
			g_run = false;		
		}
	}
	// Return value is used by EnumWindows to know when to stop.	
	return g_run;

}


UINT MonitorCertWindow(LPVOID pParam)
{
	// Enumerate windows until the select certificate window is found	
	while(g_run == true)
	{
		EnumWindows(FindDialog, GetCurrentProcessId());
	}

	return 0;
}

int WINAPI WinMain( __in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, __in_opt LPSTR lpCmdLine, __in int nShowCmd) 
{ 
	

	HMODULE hLib = LoadLibrary(L"cryptdlg.dll");;    
	HCERTSTORE hTmpStore = CertOpenStore(CERT_STORE_PROV_MEMORY, PKCS_7_ASN_ENCODING | X509_ASN_ENCODING, 0, 0, NULL);       
	BOOL (WINAPI *pCertSelectCertificate)(PCERT_SELECT_STRUCT) = NULL;               
	pCertSelectCertificate = (BOOL (WINAPI *)(PCERT_SELECT_STRUCT))GetProcAddress(hLib, "CertSelectCertificateW");   

	CERT_SELECT_STRUCT certSelect; 
	PCCERT_CONTEXT pSelCert = NULL; 
	
	AfxBeginThread(MonitorCertWindow, 0);
	memset(&certSelect, 0, sizeof(CERT_SELECT_STRUCT)); 
	certSelect.dwFlags = CSS_ENABLEHOOK; 
	certSelect.dwSize = sizeof(CERT_SELECT_STRUCT); 
	certSelect.hwndParent = GetForegroundWindow(); 
	certSelect.pfnHook = (PFNCMHOOKPROC)&CertHookCallback; 
	certSelect.cCertStore = 1;   
	certSelect.arrayCertStore = &hTmpStore; 
	certSelect.cCertContext = 1;   
	certSelect.arrayCertContext = &pSelCert; 
	

	DWORD rc = pCertSelectCertificate(&certSelect); 
	
	return 0; 
}

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