private int KeyboardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0 && (this.OnKeyDownEvent != null || this.OnKeyUpEvent != null || this.OnKeyPressEvent != null))
{
KeyBordHook.KeyboardHookStruct keyboardHookStruct = (KeyBordHook.KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBordHook.KeyboardHookStruct));
if (this.OnKeyDownEvent != null && (wParam == 256 || wParam == 260))
{
Keys vkCode = (Keys)keyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(vkCode);
this.OnKeyDownEvent(this, e);
}
if (this.OnKeyPressEvent != null && wParam == 256)
{
byte[] array = new byte[256];
KeyBordHook.GetKeyboardState(array);
byte[] array2 = new byte[2];
if (KeyBordHook.ToAscii(keyboardHookStruct.vkCode, keyboardHookStruct.scanCode, array, array2, keyboardHookStruct.flags) == 1)
{
KeyPressEventArgs e2 = new KeyPressEventArgs((char)array2[0]);
this.OnKeyPressEvent(this, e2);
}
}
if (this.OnKeyUpEvent != null && (wParam == 257 || wParam == 261))
{
Keys vkCode = (Keys)keyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(vkCode);
this.OnKeyUpEvent(this, e);
}
}
return(KeyBordHook.CallNextHookEx(KeyBordHook.hKeyboardHook, nCode, wParam, lParam));
}
public void Stop()
{
bool flag = true;
if (KeyBordHook.hKeyboardHook != 0)
{
flag = KeyBordHook.UnhookWindowsHookEx(KeyBordHook.hKeyboardHook);
KeyBordHook.hKeyboardHook = 0;
}
if (!flag)
{
throw new Exception("UnhookWindowsHookEx failed. ");
}
}
public void Start()
{
if (KeyBordHook.hKeyboardHook == 0)
{
this.KeyboardHookProcedure = new KeyBordHook.HookProc(this.KeyboardHookProc);
Process currentProcess = Process.GetCurrentProcess();
ProcessModule mainModule = currentProcess.MainModule;
KeyBordHook.hKeyboardHook = KeyBordHook.SetWindowsHookEx(13, this.KeyboardHookProcedure, KeyBordHook.GetModuleHandle(mainModule.ModuleName), 0);
if (KeyBordHook.hKeyboardHook == 0)
{
this.Stop();
}
}
}