/// <summary>
/// Insert a low level hook to the current window, or hook to all windows in the system.
/// </summary>
/// <param name="Global">Specifies if HookDll is injected to all processes</param>
public Hook(HookType hooktype, bool Global, IntPtr hWndTarget)
{
MessageHandler = new MessageLoop(WindowsMessages.WM_COPYDATA);
MessageHandler.MessageCallback += MessageHandler_WndProc;
this.Global = Global;
HookType = hooktype;
if (HookType == HookType.WH_SYSMSGFILTER)
{
Global = true;
}
//Set Hook
uint HookEnabled = 0;
if (Global)
{
HookEnabled = HookDll.SetHook((int)HookType, true, (uint)0, MessageHandler.Handle, hWndTarget);
}
else
{
HookEnabled = HookDll.SetHook((int)HookType, true, HookDll.GetCurrentThreadId(), MessageHandler.Handle, hWndTarget);
}
if (HookEnabled != 0)
{
throw new Win32Exception((int)HookEnabled);
}
}
/// <summary>
/// Unhooks the hook and disposes the messageloop
/// </summary>
public void Dispose()
{
HookDll.SetHook(0, false, 0, IntPtr.Zero, IntPtr.Zero);
MessageHandler.MessageCallback -= MessageHandler_WndProc;
MessageHandler.Close();
MessageHandler.Dispose();
}
/// <summary>
/// Inserts a low level hook to the specified process
/// </summary>
/// <param name="ToWatch">Process to intercept messages</param>
public Hook(HookType hooktype, Process ToWatch, IntPtr hWndTarget)
{
MessageHandler = new MessageLoop(WindowsMessages.WM_COPYDATA);
MessageHandler.MessageCallback += MessageHandler_WndProc;
HookType = hooktype;
uint TID = (uint)ToWatch.Threads[0].Id;
if (HookType == HookType.WH_SYSMSGFILTER)
{
TID = 0;
}
uint HookEnabled = HookDll.SetHook((int)HookType, true, TID, MessageHandler.Handle, hWndTarget);
if (HookEnabled != 0)
{
throw new Win32Exception((int)HookEnabled);
}
}