C / C++ / MFC

Fields* m_pFields = NULL;
SAFE_CALL(m_piRecordSet->Open(vSQL, vConnection, adOpenDynamic, adLockOptimistic, adCmdText));
int m_nRecordCount = m_piRecordSet->GetRecordCount();
SAFE_CALL(m_piRecordSet->get_Fields(&m_pFields));

if (m_pFields)
{
    m_pFields->Release();
}
SAFE_CALL(m_piRecordSet->Close());
m_piRecordSet.Release();
m_piRecordSet = NULL;

<br />
// SystemHook.cpp : Defines the entry point for the DLL application.<br />
<br />
#include "stdafx.h"<br />
#include "SystemHook.h"<br />
#include <stdlib.h><br />
<br />
#define ID_CMD_KEYPRESSED	WM_USER+200<br />
#define ID_CMD_WNDCREATED	WM_USER+201<br />
<br />
// Shared DATA<br />
#pragma data_seg("SHARDATA")<br />
static HWND	hwndMain = NULL;		// Main hwnd. We will get this from the App<br />
#pragma data_seg()<br />
<br />
// Globals for this module <br />
HWND     ghWndMain;				// Handle to main window -- used to post msgs<br />
HHOOK    hHookKey;			    // A handle to our installed hook <br />
HHOOK    hHookShell;	        // A handle to our installed hook <br />
<br />
static BOOL     bHookInstalled; // TRUE if hook has been installed <br />
<br />
HINSTANCE ghDLLInst;			// Handle to the DLL's instance.  Set in DllMain.<br />
<br />
<br />
BOOL APIENTRY DllMain( HANDLE hModule, <br />
                       DWORD  ul_reason_for_call, <br />
                       LPVOID lpReserved)<br />
{<br />
    switch (ul_reason_for_call)<br />
	{<br />
		case DLL_PROCESS_ATTACH:<br />
		case DLL_THREAD_ATTACH:<br />
		case DLL_THREAD_DETACH:<br />
		case DLL_PROCESS_DETACH:<br />
			break;<br />
    }<br />
	ghDLLInst=(HINSTANCE)hModule;<br />
    return TRUE;<br />
}<br />
<br />
// This is the constructor of a class that has been exported.<br />
// see SystemHook.h for the class definition<br />
CSystemHook::CSystemHook()<br />
{ <br />
	return; <br />
}<br />
<br />
// KeyboardHook() <br />
SYSTEMHOOK_API LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam)<br />
{<br />
	if (nCode >= 0) <br />
	{<br />
	   if(nCode == HC_NOREMOVE)<br />
		  return CallNextHookEx(hHookKey, nCode, wParam, lParam);<br />
<br />
	    // Skip if the key was released or if it's a repeat<br />
	    if (!(lParam & 0x80000000 || lParam & 0x40000000))<br />
		{<br />
			{<br />
				static HWND h=::FindWindow(NULL,"WinScheduler");<br />
				PostMessage(h , ID_CMD_KEYPRESSED , wParam, lParam);<br />
			}<br />
		}<br />
	}<br />
	return CallNextHookEx(hHookKey, nCode, wParam, lParam); <br />
}<br />
<br />
SYSTEMHOOK_API LRESULT CALLBACK ShellProc(int nCode,WPARAM wParam,LPARAM lParam)<br />
{<br />
	return CallNextHookEx(hHookShell, nCode, wParam, lParam); <br />
}<br />
<br />
//********************************************************************** <br />
// InstallHook() <br />
// Installs/Removes Filter function for the WH_KEYBOARD hook. <br />
// Parameters: <br />
// HWND hWnd      Handle to main window to receive posted messages.  See <br />
//                KeyboardProc() for more info on how it works. <br />
// BOOL bCode     TRUE to hook, FALSE to unhook <br />
// Returns: <br />
// 1 if successful, 0 if not. <br />
// <br />
//********************************************************************** <br />
SYSTEMHOOK_API int WINAPI InstallHook (HWND hWnd, BOOL bCode )<br />
{<br />
    int nReturn = 1;<br />
	ghWndMain = hWnd;  // Store app's window handle in DLL global variable <br />
<br />
    // Make sure that we are installing/removing in the proper order <br />
    if (bCode == bHookInstalled) <br />
        return 0; <br />
 <br />
    if (bCode)<br />
    {<br />
        hHookKey=(HHOOK)SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,ghDLLInst,0);<br />
		hHookShell=(HHOOK)SetWindowsHookEx(WH_SHELL,(HOOKPROC)ShellProc,ghDLLInst,0);<br />
        if (!hHookKey)<br />
            return 0; <br />
		if (!hHookShell)<br />
			return 0;<br />
        bHookInstalled = TRUE; <br />
    }<br />
    else <br />
    { <br />
        nReturn = UnhookWindowsHookEx(hHookKey);<br />
		nReturn &= UnhookWindowsHookEx(hHookShell);<br />
        bHookInstalled = FALSE; <br />
    }<br />
    return nReturn; <br />
}<br />