BOOL VerifySignature(wchar_t* pwszSourceFile)
{
	BOOL ret;
	LONG lStatus;
	DWORD dwLastError;
	
	WINTRUST_FILE_INFO FileData;
	memset(&FileData, 0, sizeof(FileData));
	FileData.cbStruct = sizeof(WINTRUST_FILE_INFO);
	FileData.pcwszFilePath = pwszSourceFile;
	FileData.hFile = NULL;
	FileData.pgKnownSubject = NULL;
	
	GUID WVTPolicyGUID = WINTRUST_ACTION_GENERIC_VERIFY_V2;
	WINTRUST_DATA WinTrustData;
	
	memset(&WinTrustData, 0, sizeof(WinTrustData));
	WinTrustData.cbStruct = sizeof(WinTrustData);
	WinTrustData.pPolicyCallbackData = NULL;
	WinTrustData.pSIPClientData = NULL;
	WinTrustData.dwUIChoice = WTD_UI_NONE;
	WinTrustData.fdwRevocationChecks = WTD_REVOKE_NONE; 
	WinTrustData.dwUnionChoice = WTD_CHOICE_FILE;
	WinTrustData.dwStateAction = 0;
	WinTrustData.hWVTStateData = NULL;
	WinTrustData.pwszURLReference = NULL;
	WinTrustData.dwProvFlags = WTD_SAFER_FLAG;
	WinTrustData.pFile = &FileData;
	
	lStatus = WinVerifyTrust(NULL,&WVTPolicyGUID,&WinTrustData);
	
	ret = true;
	
	if (lStatus == TRUST_E_NOSIGNATURE)
	{
		dwLastError = GetLastError();
		if (TRUST_E_NOSIGNATURE == dwLastError ||
			TRUST_E_SUBJECT_FORM_UNKNOWN == dwLastError ||
			TRUST_E_PROVIDER_UNKNOWN == dwLastError) 
		{
			ret = false;
		}
	}
	
	return ret;
}