private static void EnsureSubscribedToGlobalMouseEvents()
{
// install Mouse hook only if it is not installed and must be installed
// 필요한 경우에만 마우스 훅을 설치
if (s_MouseHookHandle == 0)
{
//See comment of this field. To avoid GC to clean it up.
s_MouseDelegate = MouseHookProc; // 마우스훅 proc에서 받아온 값을 대리자에 전달하고
//install hook
//s_MouseHookHandle = SetWindowsHookEx(
// WH_MOUSE_LL,
// s_MouseDelegate,
// Marshal.GetHINSTANCE(
// Assembly.GetExecutingAssembly().GetModules()[0]),
// 0);
var mar = ImportFunctions.LoadLibrary("user32.dll"); //FrameWork 4.0 and up, Using this is alternative
s_MouseHookHandle = ImportFunctions.SetWindowsHookEx(
Constants.WH_MOUSE_LL,
s_MouseDelegate,
mar,
0);
//If SetWindowsHookEx fails.
if (s_MouseHookHandle == 0)
{
//Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttribute.SetLastError flag set.
int errorCode = Marshal.GetLastWin32Error();
//do cleanup
//Initializes and throws a new instance of the Win32Exception class with the specified error.
throw new Win32Exception(errorCode);
}
}
}
/// <summary>
/// Installs the global hook
/// </summary>
public void hook()
{
IntPtr hInstance = ImportFunctions.LoadLibrary("User32");
hhook = ImportFunctions.SetWindowsHookEx(Constants.WH_KEYBOARD_LL, khp, hInstance, 0);
}
