private void lowLevelKeyboardProcHook(LowLevelKeyboardMessage message, KeyboardLowLevelHookStruct info)
{
switch (message)
{
case LowLevelKeyboardMessage.WM_KEYUP:
case LowLevelKeyboardMessage.WM_SYSKEYUP:
thread_KeyUp((Keys)info.vkCode); break;
case LowLevelKeyboardMessage.WM_KEYDOWN:
case LowLevelKeyboardMessage.WM_SYSKEYDOWN:
thread_KeyDown((Keys)info.vkCode); break;
default: break;
}
}
/// <summary>
/// Registers a low-level global keyboard system hook.
/// </summary>
///
public static HookHandle SetWindowHook(LowLevelKeyboardProcedure callback)
{
IntPtr hHook;
NativeMethods.LowLevelHookProc lpfn;
using (Process process = Process.GetCurrentProcess())
using (ProcessModule module = process.MainModule)
{
IntPtr hModule = NativeMethods.GetModuleHandle(module.ModuleName);
lpfn = new NativeMethods.LowLevelHookProc((nCode, wParam, lParam) =>
{
// From
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms644985(v=vs.85).aspx
//
// wParam contains the identifier of the keyboard message.
// lParam contains a pointer to a KBDLLHOOKSTRUCT structure.
//
// The wParam can be can be one of the following messages: WM_KEYDOWN,
// WM_KEYUP, WM_SYSKEYDOWN, or WM_SYSKEYUP.
if (nCode < 0)
{
return(NativeMethods.CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam));
}
KeyboardLowLevelHookStruct keyboardInfo =
(KeyboardLowLevelHookStruct)Marshal.PtrToStructure(lParam,
typeof(KeyboardLowLevelHookStruct));
callback((LowLevelKeyboardMessage)(wParam.ToInt32()), keyboardInfo);
return(NativeMethods.CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam));
});
hHook = NativeMethods.SetWindowsHookEx(
NativeMethods.HookType.WH_KEYBOARD_LL, lpfn, hModule, 0);
}
return(new HookHandle(hHook, lpfn));
}
private void lowLevelKeyboardProcHook(LowLevelKeyboardMessage message, KeyboardLowLevelHookStruct info)
{
switch (message)
{
case LowLevelKeyboardMessage.WM_KEYUP:
case LowLevelKeyboardMessage.WM_SYSKEYUP:
thread_KeyUp((Keys)info.vkCode); break;
case LowLevelKeyboardMessage.WM_KEYDOWN:
case LowLevelKeyboardMessage.WM_SYSKEYDOWN:
thread_KeyDown((Keys)info.vkCode); break;
default: break;
}
}
