public static void HookKeyboard(Input.KeyboardCallback cb)
{
Input.sHookProc = (Input.HookProc)((code, wparam, lparam) =>
{
if (code < 0 || wparam == 260U || wparam == 261U)
{
return(Input.CallNextHookEx(Input.sHookHandle, code, wparam, lparam));
}
Input.HookData structure = (Input.HookData)Marshal.PtrToStructure(lparam, typeof(Input.HookData));
return(!cb(wparam == 256U, structure.vkCode) ? 1 : Input.CallNextHookEx(Input.sHookHandle, code, wparam, lparam));
});
if (Input.sHookHandle != 0)
{
throw new SystemException("Keyboard hook is already set");
}
IntPtr moduleHandle = Input.GetModuleHandle(IntPtr.Zero);
Input.sHookHandle = Input.SetWindowsHookEx(13, Input.sHookProc, moduleHandle, 0U);
if (Input.sHookHandle == 0)
{
throw new SystemException("Cannot set hooks", (Exception) new Win32Exception(Marshal.GetLastWin32Error()));
}
}
private static extern int SetWindowsHookEx(
int type,
Input.HookProc callback,
IntPtr module,
uint threadId);
