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copied!<p><strong>Edit: I didn't know about the "AllKeys" solution posted by PaulH before, that should be a better solution than the one i posted.</strong> </p> <p>Im assuming that you want to handle the green and red hardware keys? The call and hangup keys?</p> <p>If that is the case you can monitor the keyevents and choose to not pass them on to windows if they match your criteria.</p> <pre><code>private const int WH_KEYBOARD_LL = 20; private static int _hookHandle; private HookProc _hookDelegate; [DllImport("coredll.dll")] private static extern int SetWindowsHookEx(int type, HookProc hookProc, IntPtr hInstance, int m); [DllImport("coredll.dll")] private static extern IntPtr GetModuleHandle(string mod); [DllImport("coredll.dll", SetLastError = true)] private static extern int UnhookWindowsHookEx(int idHook); [DllImport("coredll.dll")] private static extern int CallNextHookEx(HookProc hhk, int nCode, IntPtr wParam, IntPtr lParam); private bool HookKeyboardEvent(bool action) { try { if (action) { HookKeyboardEvent(false); _hookDelegate = new HookProc(HookProcedure); _hookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, _hookDelegate, GetModuleHandle(null), 0); if (_hookHandle == 0) { return false; } return true; } if (_hookHandle != 0) { //Unhook the previouse one UnhookWindowsHookEx(_hookHandle); return true; } return false; } catch (Exception ex) { string dump = ex.Message; return false; } } private int HookProcedure(int code, IntPtr wParam, IntPtr lParam) { try { var hookStruct = (KBDLLHOOKSTRUCT) Marshal.PtrToStructure(lParam, typeof (KBDLLHOOKSTRUCT)); if (DoHardwareKeyPress(hookStruct.vkCode, hookStruct.scanCode, wParam.ToInt32())) return CallNextHookEx(_hookDelegate, code, wParam, lParam); else return -1; } catch (Exception ex) { string dump = ex.Message; return -1; } } private bool DoHardwareKeyPress(int softKey, int hardKey, int keyState) { try { string keyPressInformation = string.Format("SoftKey = {0}, HardKey = {1}, KeyState = {2}", softKey, hardKey, keyState); if (softKey == 114 && hardKey == 4 && (keyState == 256 || keyState == 257)) return false; else if (softKey == 115 && hardKey == 12 && (keyState == 256 || keyState == 257)) return false; else return true; } catch (Exception ex) { string dump = ex.Message; return true; } } #region Nested type: HookProc internal delegate int HookProc(int code, IntPtr wParam, IntPtr lParam); #endregion #region Nested type: KBDLLHOOKSTRUCT private struct KBDLLHOOKSTRUCT { public IntPtr dwExtraInfo; public int flags; public int scanCode; public int time; public int vkCode; } #endregion </code></pre> <p>This is a quick and dirty solution that you might wanna clean up before use :) Just call HookKeyboardEvent(true) to enable the hook and HookKeyboardEvent(false) to unhook.</p> <p>I hope it solves your problem.</p>

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