TrapKeys.cpp

////////////////////////////////////////////////////////////////
// MSDN Magazine — September 2002
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
// Compiles with Visual Studio 6.0 and Visual Studio .NET on Windows XP.
//
#include "stdafx.h"
#include "resource.h"
#include "StatLink.h"
#include "TaskKeyMgr.h"

//////////////////
// Main dialog
//
class CMyDialog : public CDialog {
public:
   CMyDialog(CWnd* pParent = NULL) : CDialog(IDD_MYDIALOG, pParent) { }

protected:
   HICON m_hIcon;
   CStaticLink m_wndLink1;
   CStaticLink m_wndLink2;
   CStaticLink m_wndLink3;

   virtual BOOL OnInitDialog();

   // command/UI update handlers
   afx_msg void OnDisableTaskMgr();
   afx_msg void OnDisableTaskKeys();
   afx_msg void OnDisableTaskbar();
   afx_msg void OnUpdateDisableTaskMgr(CCmdUI* pCmdUI);
   afx_msg void OnUpdateDisableTaskKeys(CCmdUI* pCmdUI);
   afx_msg void OnUpdateDisableTaskbar(CCmdUI* pCmdUI);
   afx_msg LRESULT OnKickIdle(WPARAM,LPARAM);

   DECLARE_MESSAGE_MAP()
};

//////////////////
// Standard MFC dialog app class in 14 lines + comments
//
class CMyApp : public CWinApp {
public:
   virtual BOOL InitInstance() {
      // init app: run dialog
      CMyDialog dlg;
      m_pMainWnd = &dlg;
      dlg.DoModal();
      return FALSE;
   }
   virtual int ExitInstance() {
      // For safety, re-enable everything on exit
      CTaskKeyMgr::Disable(CTaskKeyMgr::ALL, FALSE);
      return 0;
   }
} theApp;

BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
   ON_COMMAND(IDC_DISABLE_TASKKEYS,OnDisableTaskKeys)
   ON_COMMAND(IDC_DISABLE_TASKBAR, OnDisableTaskbar)
   ON_COMMAND(IDC_DISABLE_TASKMGR, OnDisableTaskMgr)
   ON_UPDATE_COMMAND_UI(IDC_DISABLE_TASKKEYS, OnUpdateDisableTaskKeys)
   ON_UPDATE_COMMAND_UI(IDC_DISABLE_TASKBAR, OnUpdateDisableTaskbar)
   ON_UPDATE_COMMAND_UI(IDC_DISABLE_TASKMGR, OnUpdateDisableTaskMgr)
   ON_MESSAGE(WM_KICKIDLE,OnKickIdle)
END_MESSAGE_MAP()

//////////////////
// Initialize dialog: subclass hyperlinks and load icon
//
BOOL CMyDialog::OnInitDialog()
{
   CDialog::OnInitDialog();

   // init my hyperlinks
   m_wndLink1.SubclassDlgItem(IDC_PDURL,this);
   m_wndLink2.SubclassDlgItem(IDC_MSDNURL,this);
   m_wndLink3.SubclassDlgItem(IDC_MSDNLINK,this);

   // Set the icon for this dialog. MFC doesn't do it for dialog apps.
   m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
   SetIcon(m_hIcon, TRUE);       // Set big icon
   SetIcon(m_hIcon, FALSE);      // Set small icon
   
   return TRUE;
}

////////////////////////////////////////////////////////////////
// Command/UI update handlers. You can write this in your sleep—Zzzz.

void CMyDialog::OnDisableTaskKeys()
{
   CTaskKeyMgr::Disable(CTaskKeyMgr::TASKKEYS,
      !CTaskKeyMgr::AreTaskKeysDisabled(), TRUE); // beep
}

void CMyDialog::OnUpdateDisableTaskKeys(CCmdUI* pCmdUI)
{
   pCmdUI->SetCheck(CTaskKeyMgr::AreTaskKeysDisabled());
}

void CMyDialog::OnDisableTaskbar()
{
   CTaskKeyMgr::Disable(CTaskKeyMgr::TASKBAR,
      !CTaskKeyMgr::IsTaskBarDisabled());
}

void CMyDialog::OnUpdateDisableTaskbar(CCmdUI* pCmdUI)
{
   pCmdUI->SetCheck(CTaskKeyMgr::IsTaskBarDisabled());
}

void CMyDialog::OnDisableTaskMgr()
{
   CTaskKeyMgr::Disable(CTaskKeyMgr::TASKMGR,
      !CTaskKeyMgr::IsTaskMgrDisabled());
}

void CMyDialog::OnUpdateDisableTaskMgr(CCmdUI* pCmdUI)
{
   pCmdUI->SetCheck(CTaskKeyMgr::IsTaskMgrDisabled());
}

//////////////////
// This is required to make ON_UPDATE_COMMAND_UI work properly.
// Cf. my column in the July 1997 Microsoft Systems Journal.
// 
LRESULT CMyDialog::OnKickIdle(WPARAM wp, LPARAM lCount)
{
   UpdateDialogControls(this, TRUE);
   return 0;
}